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Is Flashing a i9020T t-mobile variant Nexus s with an At&t Radio Possible?

Just wondering if it is possible to flash the i9020T to maybe a different Base-band or Radio, pretty much changing it to an i9020A, I have taken both these phone models apart and the Hardware radio is "exactly" the same version!!! So the Radio band is Software/Baseband contingent I believe, On the T-Mobile Vibrant I could get at&t 850mhz. 3G enable via a service menu by entering *#4636#*#*, is there a service menu option to enable 850 at&t 3G or possibly a kernel/Baseband flash to change this phone, Come on software guys throw me a bone!!!

no, the hardware is definitely different.

No the hardware is not different, I have two different model number phones that I took down i9020T and i9020A and hardware is identical to the T.,,,,Also strange thing is best buy no longer sell's i9020A, they Sell the i9020T for at&t service and do not offer the i9020T for t-mobile at all,...So what I was saying before you decided to offer your "OPINION" based on what you read or heard is that the radio is software/baseband and not hardware determined.
You do know I have both versions of these phones and have dissembled and inspected them correct? Just wondering, cause it seems to me you read the title of the post and just started typing away without reading.

Here is the best buy link
if you would kindly check the model number, and also if you would try to search for the Nexus S for t-mobile, it no longer exists on the site....http://www.bestbuy.com/site/Samsung+-+Google+Nexus+S+Mobile+Phone+-+Black+%28AT%26T%29/2356115.p?skuId=2356115&id=1218323076669

I would not go by what they list on a website.
You need to actually find a single t version on att 3g or vice versa.

DaveNavy said:
So what I was saying before you decided to offer your "OPINION" based on what you read or heard is that the radio is software/baseband and not hardware determined.
You do know I have both versions of these phones and have dissembled and inspected them correct? Just wondering, cause it seems to me you read the title of the post and just started typing away without reading.
Click to expand...
Click to collapse
Since you "KNOW BETTER", why did you even bother to ask? Just wondering.
The hardware is different.

shrivelfig said:
Since you "KNOW BETTER", why did you even bother to ask? Just wondering.
The hardware is different.
Click to expand...
Click to collapse
Did I ask about hardware?...reading is fundamental ....and so is reading compression

DaveNavy said:
Did I ask about hardware?...reading is fundamental ....and so is reading compression
Click to expand...
Click to collapse
Talk about reading is fundamental.......had you followed your mantra you would know the answer to your question.
Sent from my Nexus S 4G using xda premium

DaveNavy said:
Did I ask about hardware?...reading is fundamental ....and so is reading compression
Click to expand...
Click to collapse
The RADIO hardware is difference. Your "Vibrant" worked because the PHYSICAL RADIO hardware supported AT&T's 3G bands. The i9020t does not and will not. It does not contain a pentaband HSPA/UMTS radio.
The i9020t ONLY supports the frequencies 900/1700/2100.
The i9020a ONLY supports 850/1900/2100.
You MUST have 850 and or 1900 for AT&T 3G (they use different frequencies in different areas). You MUST have BOTH 1700 and 2100 for T-Mobile as the split their service into up and downstream across both frequencies.
No piece of software you flash is going to what the physical hardware supports.

do you have physical proof to back what you are saying? Because The chipset is exactly the same, just saying, I have both phones in front of me and wireless radio in them is the exact model, bestbuy.com and negri.com are both selling factory i9020T that run on 850/900/1800/1900 1700/2100/1900 bands Quadband and Bestbuy is Selling The GT-i9020T for New At&t Contracts at this very moment,...and I was using the vibrant only for an example, and I understand that you have read somewhere that the hardware is different, do you have a take down video showing different radio/chipset? Not trying to get into a pissing match with you, but I have read the same thing as you have about the i9020T supporting only t-mobile 3G bands, however The Vibrant Example is a reminder only that it is still listed as only supporting T-mobile 3G however *#*#4636#*#* service menu allowed activation of the 850 band WCDMA and At&t 3G worked, Go ahead and argue over and over again though and don't bother trying to explore if this will work or not......
On a side note, XDA has went way down hill since I first Joined, People used to work together on solutions, now there are a bunch of "know it all's" that just come here to share their self inflated professional opinion that is nowhere near any sort of developer experience whatsoever, try getting off your high horse for a minute there and remember this is supposed to be fun and exciting to do cool stuff with our phones.

DaveNavy said:
do you have physical proof to back what you are saying? Because The chipset is exactly the same, just saying, I have both phones in front of me and wireless radio in them is the exact model, bestbuy.com and negri.com are both selling factory i9020T that run on 850/900/1800/1900 1700/2100/1900 bands Quadband...So put that in your crack pipe and smoke it LOL!!!
Click to expand...
Click to collapse
The FCC filings? I am going to assume Samsung's not lying in their filings for the respective models. Feel free to flash away though if you'd like.

Here is a couple take downs to explain in further detail
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Here is the radio board it has a Skyworks SKY77529 Tx Front-End Module for Dual-Band GSM / GPRS / EDGE
and a
Infineon 8824 XG616 X-Gold baseband processor ...
These two Items handle the The radio frequencies, The Infineon 8824 is what determines what 3G frequencies are being used, Both Models i9020T and i9020A are using this chipset, the only difference is the Infineon 8824 Chip is flashed with a different firmware one for i9020T T-Mobile and one for i9020A At&t, The baseband is updatable by OTA , it has been updated already on the i9020T.

krohnjw said:
The FCC filings? I am going to assume Samsung's not lying in their filings for the respective models. Feel free to flash away though if you'd like.
Click to expand...
Click to collapse
AH AH AH If you believe that , you will believe anything.

DaveNavy said:
AH AH AH If you believe that , you will believe anything.
Click to expand...
Click to collapse
Please flash away and let us know how it goes.
Sent from my Nexus S using XDA App

Frankly you not believing the FCC filing but believing what info that a site like best buy has listed about the phone is comical.

you can flash the att radio onto a tmobile nexus s and vice versa. that IS possible. BUT, you will not have working 3g, edge should work though. this has been done by a few people accidentally. and they have found out that 3g does not work ever again, even after flashing the correct radio again.

Picked up an att nexus from best buy today. It's an A not a T

Went to bestbuy today and they confirmed that the at&t i9020A handles only at&t 3G however they also confirmed the i9020T is quad band and the firmware and baseband is what decides what bands to allow service menu is read off of the baseband so basically what I was told is that samsund flashed the newer manufactured i9020T with at&t network bands enabling 3g because the hardware is there, there is some sort of legal action happening between Samsung and t - mobile that's why bestbuy and Google have discontinued sales of the nexus s for t-mobile....straight from the horses mouth at best buy, was also told ice cream sandwich 4.0 will also have a baseband update to enable the at&t 3g band in those handsets where customers areonly receiving edge data on their i9020T handset that where pervisioned to T-Mobile prior to the product being pulled.

simms22 said:
you can flash the att radio onto a tmobile nexus s and vice versa. that IS possible. BUT, you will not have working 3g, edge should work though. this has been done by a few people accidentally. and they have found out that 3g does not work ever again, even after flashing the correct radio again.
Click to expand...
Click to collapse
This makes total sense, flashing a radio to a non compatible. Baseband could prove to me disastrous, now a at&t baseband flashed to the i9020T maybe more along the lines of enabling at&t 3g, had a long talk with sales manager at besybuy mobile store today, we talked for over an hour about this subject.

DaveNavy said:
Went to bestbuy today and they confirmed that the at&t i9020A handles only at&t 3G however they also confirmed the i9020T is quad band and the firmware and baseband is what decides what bands to allow service menu is read off of the baseband so basically what I was told is that samsund flashed the newer manufactured i9020T with at&t network bands enabling 3g because the hardware is there, there is some sort of legal action happening between Samsung and t - mobile that's why bestbuy and Google have discontinued sales of the nexus s for t-mobile....straight from the horses mouth at best buy, was also told ice cream sandwich 4.0 will also have a baseband update to enable the at&t 3g band in those handsets where customers areonly receiving edge data on their i9020T handset that where pervisioned to T-Mobile prior to the product being pulled.
Click to expand...
Click to collapse
interesting

Rogers HTC One X Unlocked on Telus Network

I picked up the HTC One X from rogers on the 19th and unlocked it and set it up with telus.
I'm looking for anyone else who may have done this cause I have a few questions
When I'm in an LTE area my phone will switch to the LTE network no problem but my download speeds are only about 9mbps I know with my HTC Amaze on the HSPA+ I would be able to get around 16mbps download.
Is this just something with Telus LTE network being fairly new? has anyone else got any faster speeds on LTE?
Other than that and the non-removable battery this phone is the bomb I love it not to sure how i'm going to be able to get by with out being able to swap the battery but I'm going to try. I had 3 extra batteries with my Amaze lol.

Just out of curiosity, how did you go about unlocking it? I have had some trouble getting unlock codes for the one I bought. Any help you can give would be great, thanks!

djdriver said:
Just out of curiosity, how did you go about unlocking it? I have had some trouble getting unlock codes for the one I bought. Any help you can give would be great, thanks!
Click to expand...
Click to collapse
MobileInCanada has unlock codes for the Rogers One X. I haven't unlocked mine, but I have used them in the past, and they've always been reliable. Codes for Rogers phones do tend to be a bit slow to come through them though.

djdriver said:
Just out of curiosity, how did you go about unlocking it? I have had some trouble getting unlock codes for the one I bought. Any help you can give would be great, thanks!
Click to expand...
Click to collapse
I unlocked my Rogers HTC One X using Cellunlocker, it was ~$8 which is the cheapest I have seen. It took about 2 hours to get the code in the email.

danada said:
I unlocked my Rogers HTC One X using Cellunlocker, it was ~$8 which is the cheapest I have seen. It took about 2 hours to get the code in the email.
Click to expand...
Click to collapse
Thats who I also used I've used them in the past and they have always been the cheapest and fastest.

I also used Cellunlocker. Only took 20 minutes to get my code by email!
Here are my LTE results on Telus:
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I've been so impressed with this phone I swore I wouldn't mess with it but it's an addiction. Thanks for site name. Good to know a site that has been used successfully before. Hoping for a MIUI rom soon.

Telus HSPA is 2x Faster than Rogers ...
killathenoob said:
I picked up the HTC One X from rogers on the 19th and unlocked it and set it up with telus.
I'm looking for anyone else who may have done this cause I have a few questions
When I'm in an LTE area my phone will switch to the LTE network no problem but my download speeds are only about 9mbps I know with my HTC Amaze on the HSPA+ I would be able to get around 16mbps download.
Is this just something with Telus LTE network being fairly new? has anyone else got any faster speeds on LTE?
Other than that and the non-removable battery this phone is the bomb I love it not to sure how i'm going to be able to get by with out being able to swap the battery but I'm going to try. I had 3 extra batteries with my Amaze lol.
Click to expand...
Click to collapse
Keep in mind that the HSPA speed on Telus is rated at 42Mbps, while the same on Rogers is 1/2 the speed, or 21Mbps. This is probably why your speed is much slower.
Make sure your APN information is correct, too.
Peter
P.S. I used http://www.cellunlockcode.com/ (cell unlock code) to unlock mine. Like others, it took a few hours. Cost was $12

I've also unlocked my device for Telus network. I got 14Mbps once but average around 9Mbps as well. I don't get consistent LTE 4G coverage however and mostly receive HSPA+ 4g.

Just verifying that if I pick up this Rogers HTC ONE X - I'll be able to use it on AT&T's LTE network once I unlock it, yes?
I called Rogers and the guy told me the phone was the Quad Core version and that it may or may not support AT&T's LTE

redchord11 said:
Just verifying that if I pick up this Rogers HTC ONE X - I'll be able to use it on AT&T's LTE network once I unlock it, yes?
I called Rogers and the guy told me the phone was the Quad Core version and that it may or may not support AT&T's LTE
Click to expand...
Click to collapse
The Rogers rep you spoke to is incorrect. The Rogers version is indeed the same LTE version those in the USA will be getting and will work on AT&T given you unlock, get the right SIM, and set up your apn respectively.
I believe there are other members that currently do this.

Just an update on this after further investigation I found that for some reason when the phone shows 4g its actually connected to the hspa network and when the phone shows LTE it is actually only hspda+ network that it's connected to. I'm not sure why it's like this but for some reason the phone won't connect to the telus LTE network.
The specs for the phone show that it should be able to connect to the telus LTE network but I have also read somewhere that rogers might have disabled part of the radio that wasn't being used on there network. Maybe once we get s-off and can flash different radios this will be fixed

Did anyone figure out how to fix this issue? i have a rogers htc one x that i am using on telus network, and my phone always shows 4G, i've never seen the LTE.
killathenoob said:
Just an update on this after further investigation I found that for some reason when the phone shows 4g its actually connected to the hspa network and when the phone shows LTE it is actually only hspda+ network that it's connected to. I'm not sure why it's like this but for some reason the phone won't connect to the telus LTE network.
The specs for the phone show that it should be able to connect to the telus LTE network but I have also read somewhere that rogers might have disabled part of the radio that wasn't being used on there network. Maybe once we get s-off and can flash different radios this will be fixed
Click to expand...
Click to collapse

mamooj said:
Did anyone figure out how to fix this issue? i have a rogers htc one x that i am using on telus network, and my phone always shows 4G, i've never seen the LTE.
Click to expand...
Click to collapse
Are you sure you're in an LTE covered area? If you are make sure you input the telus HSPA+&LTE apn. Look for it on Google. I've seen LTE on my unlocked One X but only in Vancouver.
Sent from my HTC One X using Tapatalk 2

I'm also using an unlocked Rogers phone on Telus.
I've had trouble at first getting it to connect to the LTE network. When I changed the Network mode setting under Mobile data to GSM/CDMA/LTE auto, it wouldn't stick.
To fix this I changed the same setting in the info menu by dialing *#*#4636#*# --> Phone info --> Set preferred network mode --> GSM/WCDMA/LTE auto.
After doing this, I can use the regular menu to either turn on LTE or limit the phone to GSM/WCDMA.
This setting clearly works and when it says LTE I believe it is connected to the LTE network. However, my DL speeds seem to be capped at about 7-9 Mbps too. My UL speeds are around 20 Mbps. In 4G mode I get around 8/3 down/up.

Being on all the networks that we have in Canada.the highest LTE.speed I've seen so far is on Bell. 16mb per seconds and even lower speed with Telus or Rogers.
Sent from my HTC One X using xda premium

I am rocking 25-50 megs down in Vancouver on my rogers HTC one x on telus .
Sent from my One X using xda premium

I will try this out. anyone has any issues with data cutting out? for example when i open the youtube app and search for something i get an error that its not connected. same thing happens with playstore and browser. hopefully this would fix it.
crabnebula said:
I'm also using an unlocked Rogers phone on Telus.
I've had trouble at first getting it to connect to the LTE network. When I changed the Network mode setting under Mobile data to GSM/CDMA/LTE auto, it wouldn't stick.
To fix this I changed the same setting in the info menu by dialing *#*#4636#*# --> Phone info --> Set preferred network mode --> GSM/WCDMA/LTE auto.
After doing this, I can use the regular menu to either turn on LTE or limit the phone to GSM/WCDMA.
This setting clearly works and when it says LTE I believe it is connected to the LTE network. However, my DL speeds seem to be capped at about 7-9 Mbps too. My UL speeds are around 20 Mbps. In 4G mode I get around 8/3 down/up.
Click to expand...
Click to collapse

mamooj said:
I will try this out. anyone has any issues with data cutting out? for example when i open the youtube app and search for something i get an error that its not connected. same thing happens with playstore and browser. hopefully this would fix it.
Click to expand...
Click to collapse
My data cuts off once in a while. And I already flashed my phone with a different radio
Sent from my HTC One X using xda app-developers app

I tried this and still no luck. mine was already in that setting and i have never seen LTE appearing in my phone. is there anyways i can flash this rogers phone to telus? i hate all the extra crap they have installed on the OS too and want to get rid of them. any help is appreciated
crabnebula said:
I'm also using an unlocked Rogers phone on Telus.
I've had trouble at first getting it to connect to the LTE network. When I changed the Network mode setting under Mobile data to GSM/CDMA/LTE auto, it wouldn't stick.
To fix this I changed the same setting in the info menu by dialing *#*#4636#*# --> Phone info --> Set preferred network mode --> GSM/WCDMA/LTE auto.
After doing this, I can use the regular menu to either turn on LTE or limit the phone to GSM/WCDMA.
This setting clearly works and when it says LTE I believe it is connected to the LTE network. However, my DL speeds seem to be capped at about 7-9 Mbps too. My UL speeds are around 20 Mbps. In 4G mode I get around 8/3 down/up.
Click to expand...
Click to collapse

[Q] Tried to Setup Spark - Now No LTE At All

Got my new Play Store N5 this week and got it all setup rooted and ROM'd, but I realized yesterday that I wasn't setup correctly to use Sprint's tri-band LTE Spark. It had been connecting to LTE fine on one band, but I wanted to see if the extra two would help increase speeds and maybe some coverage, so I followed a guide I found on here.
http://forum.xda-developers.com/google-nexus-5/help/sprint-tri-band-activation-help-t2515798
Now my phone won't connect to LTE at all. I've called Sprint and even stopped in at one of their repairs stores, but I can't stand being asked to restart my phone or hit update profile again after about 20 times already. One of the techs even said I need to get a new phone!
Can anyone help with this? Would reflashing the stock image help at all? Was the tech right, do I really need a new phone?

BaumerS4 said:
Got my new Play Store N5 this week and got it all setup rooted and ROM'd, but I realized yesterday that I wasn't setup correctly to use Sprint's tri-band LTE Spark. It had been connecting to LTE fine on one band, but I wanted to see if the extra two would help increase speeds and maybe some coverage, so I followed a guide I found on here.
http://forum.xda-developers.com/google-nexus-5/help/sprint-tri-band-activation-help-t2515798
Now my phone won't connect to LTE at all. I've called Sprint and even stopped in at one of their repairs stores, but I can't stand being asked to restart my phone or hit update profile again after about 20 times already. One of the techs even said I need to get a new phone!
Can anyone help with this? Would reflashing the stock image help at all? Was the tech right, do I really need a new phone?
Click to expand...
Click to collapse
I would reflash the stock rom if i we `re you and see if that fixes your problem, look here for how to http://forum.xda-developers.com/google-nexus-5/general/tutorial-how-to-flash-factory-image-t2513701. Good luck mate.

BaumerS4 said:
Got my new Play Store N5 this week and got it all setup rooted and ROM'd, but I realized yesterday that I wasn't setup correctly to use Sprint's tri-band LTE Spark. It had been connecting to LTE fine on one band, but I wanted to see if the extra two would help increase speeds and maybe some coverage, so I followed a guide I found on here.
http://forum.xda-developers.com/google-nexus-5/help/sprint-tri-band-activation-help-t2515798
Now my phone won't connect to LTE at all. I've called Sprint and even stopped in at one of their repairs stores, but I can't stand being asked to restart my phone or hit update profile again after about 20 times already. One of the techs even said I need to get a new phone!
Can anyone help with this? Would reflashing the stock image help at all? Was the tech right, do I really need a new phone?
Click to expand...
Click to collapse
Did you revert the changes you made?
sent from my Hammerhead Nexus

CRIME INC. said:
Did you revert the changes you made?
sent from my Hammerhead Nexus
Click to expand...
Click to collapse
Aren`t they overwtitten by flashing the stock rom?

They may be by flashing stock images, but not by just resetting or flashing another ROM.
Edit: I'm betting that all he needs to do is revert the settings. If you need the settings I'll post them
sent from my Hammerhead Nexus

CRIME INC. said:
They may be by flashing stock images, but not by just resetting or flashing another ROM.
Edit: I'm betting that all he needs to do is revert the settings. If you need the settings I'll post them
sent from my Hammerhead Nexus
Click to expand...
Click to collapse
I've tried reverting them to no avail, plus they seem to change whenever I update my profile/PRL. But if you could post what you have them set to (especially if you are using Spark) that would be fantastic.

CRIME INC. said:
They may be by flashing stock images, but not by just resetting or flashing another ROM.
Edit: I'm betting that all he needs to do is revert the settings. If you need the settings I'll post them
sent from my Hammerhead Nexus
Click to expand...
Click to collapse
Worth a shot! Flashing is always a possibility.

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Spark may not be available in your area as of yet. Its not in mine
sent from my Hammerhead Nexus

CRIME INC. said:
Spark may not be available in your area as of yet. Its not in mine
sent from my Hammerhead Nexus
Click to expand...
Click to collapse
I'm in Chicago, so I believe it is supposed to be enabled.

BaumerS4 said:
I'm in Chicago, so I believe it is supposed to be enabled.
Click to expand...
Click to collapse
I'd just wait till Sprint rolls out the update for it. But use the screen shot I provided to set it back up, and see if it makes a difference
sent from my Hammerhead Nexus

CRIME INC. said:
I'd just wait till Sprint rolls out the update for it. But use the screen shot I provided to set it back up, and see if it makes a difference
sent from my Hammerhead Nexus
Click to expand...
Click to collapse
How does Sprint roll out updates for the N5? Is it just through profile updates? Buying from the Play Store, I will never receive an OTA from Sprint, right?

BaumerS4 said:
How does Sprint roll out updates for the N5? Is it just through profile updates? Buying from the Play Store, I will never receive an OTA from Sprint, right?
Click to expand...
Click to collapse
To be honest I'm not sure of the "how" of it. I just read an article, a little while back, saying they were going to do an update to activate spark on their devices.
Edit: And you shouldn't have an issue receiving it since you're connected to Sprint service.
sent from my Hammerhead Nexus

BaumerS4 said:
How does Sprint roll out updates for the N5? Is it just through profile updates? Buying from the Play Store, I will never receive an OTA from Sprint, right?
Click to expand...
Click to collapse
Sprint submits the changes they want to Google and Google incorporates it into their Android updates. LG and Sprint had long ago fixed whatever their issue was with the Spark update rolled out for the LG G2 in late jan/early feb so it's mainly up to Google now to push the update.
As the Nexus 5 is not native to Sprint and is basically the phone for the entire North American region, Google will not push an update just for one specific carrier. Thus we Nexus 5 users on Sprint have waited over 5 months for the next Google Android update which will enable B26/ B41 (aka Spark).
p.s. Availability of band 25 PCS 1900 LTE tends to screw with non Spark updated phones.

I followed the steps in the post linked in the first reply (used Method 2, Method 1 kept failing fastboot halfway through) and reset my phone back to stock. But it still doesn't want to connect to Sprint's LTE. I even played around with the LTE radio settings again in the hope of enabling Spark and nada.
Would it have been possible to corrupt the phone software totally while doing this to begin with? Do I need to send it back? (and on that note, you have no idea how frustrating it is to explain to a Sprint rep on the phone that you bought the phone from Google online. Such a foreign concept to them!) Could the SIM card have gotten corrupted and I just need a new one of those?

BaumerS4 said:
I followed the steps in the post linked in the first reply (used Method 2, Method 1 kept failing fastboot halfway through) and reset my phone back to stock. But it still doesn't want to connect to Sprint's LTE. I even played around with the LTE radio settings again in the hope of enabling Spark and nada.
Would it have been possible to corrupt the phone software totally while doing this to begin with? Do I need to send it back? (and on that note, you have no idea how frustrating it is to explain to a Sprint rep on the phone that you bought the phone from Google online. Such a foreign concept to them!) Could the SIM card have gotten corrupted and I just need a new one of those?
Click to expand...
Click to collapse
Update: So after downloading the necessary files to my laptop at work, I followed the procedures to reflash to stock again this morning. It came up as failed activation at first, but after hitting update profile and rebooting the phone, I'm back on LTE again. And after checking Android Central this morning, it seems like I should just wait for Google to fix my Spark issues...
http://www.androidcentral.com/sprint-nexus-5-update-pushing-out-added-spark
So tempted to roll back into the Sprint store that told me I needed a new phone and shove my LTE-enabled phone in their faces.

[Q] A question regarding to ATT 4G lte

Hello Everybody
I have a question regarding to ATT LTE. I bought a xperia z3 from Amazon, a US unlock version. The model number is D6603. It support ATT 4G lte perfect.
Days ago, I wanted to root my phone, and found this thread
http://forum.xda-developers.com/z3/general/guide-rootrecovery-how-to-root-install-t3017056
but the software does not support my build number. So I download the firmware from the thread also, which is D6603_23.0.A.2.93.
After rooted my z3, I am unable to use ATT 4G LTE anymore. I dont even have this option lists in my setting. I found a number of differences under "about phone"
my old baseband version is 8974-AAAAANAZQ-00022-21, Kernel version is 3.4.0-perf-g1b1963a-02930-g23f7791, and build number is 23.0.1.A.5.77. The new baseband version is 8974-AAAAANAZQ-00005-05, Kernel version is 3.4.0-perf-g0961cdf, and build number is 23.0.A.0.93.
I dont really know the meaning of those numbers. But I really want to use my ATT 4G LTE again. Can some one tell me how to fix it? or please send me some thread to look at. ​

phoenix_1368 said:
Hello Everybody
I have a question regarding to ATT LTE. I bought a xperia z3 from Amazon, a US unlock version. The model number is D6603. It support ATT 4G lte perfect.
Days ago, I wanted to root my phone, and found this thread
http://forum.xda-developers.com/z3/general/guide-rootrecovery-how-to-root-install-t3017056
but the software does not support my build number. So I download the firmware from the thread also, which is D6603_23.0.A.2.93.
After rooted my z3, I am unable to use ATT 4G LTE anymore. I dont even have this option lists in my setting. I found a number of differences under "about phone"
my old baseband version is 8974-AAAAANAZQ-00022-21, Kernel version is 3.4.0-perf-g1b1963a-02930-g23f7791, and build number is 23.0.1.A.5.77. The new baseband version is 8974-AAAAANAZQ-00005-05, Kernel version is 3.4.0-perf-g0961cdf, and build number is 23.0.A.0.93.
I dont really know the meaning of those numbers. But I really want to use my ATT 4G LTE again. Can some one tell me how to fix it? or please send me some thread to look at. ​
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You can try with flashing just baseband from your old firmware. It might work.
But backup all your stuff before doing anything.
Also check your APN settings.

thank you
electrash said:
You can try with flashing just baseband from your old firmware. It might work.
But backup all your stuff before doing anything.
Also check your APN settings.
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well, i dont really know how to do that, any thread that I can take a look?

phoenix_1368 said:
well, i dont really know how to do that, any thread that I can take a look?
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The same way you flashed the FTF before, but this time exclude everything except baseband and clear all the ticks to wipe data etc...

thank you man
gregbradley said:
The same way you flashed the FTF before, but this time exclude everything except baseband and clear all the ticks to wipe data etc...
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thank you man, I gotta you! thank you very much.
At the meanwhile, I have a quick question.
I used to have a LTE option or turn on button in my setting, but now is long gone. Do you need that special, specific button or option to turn on your 4G.
Sorry man, I am in Japan now, so I cant test it.........

phoenix_1368 said:
thank you man, I gotta you! thank you very much.
At the meanwhile, I have a quick question.
I used to have a LTE option or turn on button in my setting, but now is longer gone. Do you need that special, specific button or option to turn on your 4G.
Sorry man, I am in Japan now, so I cant test it.........
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Click to collapse
I assume you said you don't have 4G in your options under network. Am I correct?
Sent from my D6603 using XDA Free mobile app

You are so right bro
electrash said:
I assume you said you don't have 4G in your options under network. Am I correct?
Sent from my D6603 using XDA Free mobile app
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You are so right bro. I am in Japan right now, so I could not possibly test the device. The reason why I feel that I cant use my LTE is because that option was long gone.

phoenix_1368 said:
You are so right bro. I am in Japan right now, so I could not possibly test the device. The reason why I feel that I cant use my LTE is because that option was long gone.
Click to expand...
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*#*#7378423#*#*
Type this in phone dial, then tap on service test, then antenna RX diversity.
Tell me which option you have there.
Sent from my D6603 using XDA Free mobile app

thank you very much man
electrash said:
*#*#7378423#*#*
Type this in phone dial, then tap on service test, then antenna RX diversity.
Tell me which option you have there.
Sent from my D6603 using XDA Free mobile app
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Yoo man, thank you so much, I dont know what I should say beside thank you. I am just very grateful！！
There are two options under antenna RX diversity,.
Under network mode, I have WCDMA and FDD_LTE. It was set on wcdma
Under RX Diversity Settings, I have three options, including both RX Antennas enabled (default), primary RX antenna enabled only, Secondary RX antenna enabled only. On top of that, nothing was checked.
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phoenix_1368 said:
Yoo man, thank you so much, I dont know what I should say beside thank you. I am just very grateful！！
There are two options under antenna RX diversity,.
Under network mode, I have WCDMA and FDD_LTE. It was set on wcdma
Under RX Diversity Settings, I have three options, including both RX Antennas enabled (default), primary RX antenna enabled only, Secondary RX antenna enabled only. On top of that, nothing was checked.
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Did you tried to change on LTE? is it works now?

noop
electrash said:
Did you tried to change on LTE? is it works now?
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no man, that lte option just gone no where. I tried it and it does not show that option, which i can turn on my lte. .
by the waym where you turn on your lte? under which menu

phoenix_1368 said:
no man, that lte option just gone no where. I tried it and it does not show that option, which i can turn on my lte. .
by the waym where you turn on your lte? under which menu
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Well then sorry mate. Your only last option to go back on your starting firmware.
And I don't use 4G because more often carrier lock the speed on same level as 3G. And it has less coverage.
Also often go from 2G (rural) to 3G in city and 4G in city center which consume hell from battery.
So I only use 2G/3G combination.. 4G for me is useless, all of this is just public beta testing (I study telematics and this is one area of study).. Truth is 4G is not ready for giving it's possibilities.. In next 5years maybe it will be ready.
Sent from my D6603 using XDA Free mobile app

electrash said:
Well then sorry mate. Your only last option to go back on your starting firmware.
And I don't use 4G because more often carrier lock the speed on same level as 3G. And it has less coverage.
Also often go from 2G (rural) to 3G in city and 4G in city center which consume hell from battery.
So I only use 2G/3G combination.. 4G for me is useless, all of this is just public beta testing (I study telematics and this is one area of study).. Truth is 4G is not ready for giving it's possibilities.. In next 5years maybe it will be ready.
Sent from my D6603 using XDA Free mobile app
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Oh well, Please, dont say sorry bro. You did a lot more than I can possibly imagine. The honor is all mine!
I am currently in Japan right, so even it works, I wont know it anyway.
I found one thing particularly interesting. Under service settings, there is a option call network mode, and under it there is a option said lte_GSM_WCDMA.
I think and I believe that after I go back home and change it to lte_gsm_wcdma. It might work.
I thought about change back to my original FTF, but I will lost my root. So hard decision, right?
By the way, is there any possibility to keep my root while flash back to my old firmware version which is 23.0.1.A.5.77

Hmm... Strange. I downloaded one of the .93 distributions from here and had no issue with LTE.
Although I did almost immediately upgrade back to whatever the newer version was, choosing the "US Generic" variant in XperiFirm. So maybe I never noticed the lack of LTE.

yoo man
Entropy512 said:
Hmm... Strange. I downloaded one of the .93 distributions from here and had no issue with LTE.
Although I did almost immediately upgrade back to whatever the newer version was, choosing the "US Generic" variant in XperiFirm. So maybe I never noticed the lack of LTE.
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Yoo man, you mind do me a favor? Under setting, network, do you have a lte option? also under the quick settings, do you have a lte bottom?
by the way where you download your 4.4.4 93ftf? xda? the same thread?

phoenix_1368 said:
Yoo man, you mind do me a favor? Under setting, network, do you have a lte option? also under the quick settings, do you have a lte bottom?
by the way where you download your 4.4.4 93ftf? xda? the same thread?
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I downloaded the "Generic Global" .93 version from http://forum.xda-developers.com/z3/general/ftf-stock-firmwares-xperia-z3-models-t2886061 - I used that to root, but I think almost immediately used XperiFirm to go back up to whatever the latest 4.4.4 build for "US Generic" or whatever the non-branded US option was as of a few months ago (I think it was released in December?)
I never flashed a 5.0 stock firmware on my device, I've been running Omni for months. I have the LTE options in Settings and my device signal status says "LTE".

sorry man, question again
Entropy512 said:
I downloaded the "Generic Global" .93 version from http://forum.xda-developers.com/z3/general/ftf-stock-firmwares-xperia-z3-models-t2886061 - I used that to root, but I think almost immediately used XperiFirm to go back up to whatever the latest 4.4.4 build for "US Generic" or whatever the non-branded US option was as of a few months ago (I think it was released in December?)
I never flashed a 5.0 stock firmware on my device, I've been running Omni for months. I have the LTE options in Settings and my device signal status says "LTE".
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Sorry, man , I am a bit confuse. Well, I bought my phone on amazon(amazon itself is the seller, so which means that my phone is authentic US version, not some crazy thing from HK). the original build number is 23.0.1.A.5.77. The root software from xda does not support this version, and that is primary reason why I flash to 23.0.A.2.93.
But my question is how did you root your z3 with your US generic, which I remember the software did not support the build number.
sorry man, lots of question,

phoenix_1368 said:
Sorry, man , I am a bit confuse. Well, I bought my phone on amazon(amazon itself is the seller, so which means that my phone is authentic US version, not some crazy thing from HK). the original build number is 23.0.1.A.5.77. The root software from xda does not support this version, and that is primary reason why I flash to 23.0.A.2.93.
But my question is how did you root your z3 with your US generic, which I remember the software did not support the build number.
sorry man, lots of question,
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Click to collapse
I flashed the Generic Global .93 build from here in order to root/backup TA/unlock.
Then, at the time I was doing unlocking/rooting, .77 was the "newest" build and there was a "US Generic" or something like that (I don't remember exactly) in XperiFirm. It's probably now a Lollipop build. XperiFirm does not appear to be able to grab old builds, but the newest US D6603 build should work. Either way, I used a .77 build that was labeled as being for the USA in XperiFirm.

LTE band 4 working on Verizon?

Anyone with issues getting band 4? At home I always have it but am stuck on band 13. Any suggestions?
The app LTE discovery will let you know what band your on.

It's good to see someone has it on Verizon. Mine won't connect to the network at all.

dodendemise said:
It's good to see someone has it on Verizon. Mine won't connect to the network at all.
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Did you take your sim from an active phone on your Verizon account? Have hd voice added on as extra service?
Problem for me is HTC's site says it has band 4 which is xlte for Verizon. It won't recognize band 4.

droidrev71 said:
Did you take your sim from an active phone on your Verizon account? Have hd voice added on as extra service?
Problem for me is HTC's site says it has band 4 which is xlte for Verizon. It won't recognize band 4.
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The HTC One M8 doesn't have advanced calling which is what I was using before.

dodendemise said:
The HTC One M8 doesn't have advanced calling which is what I was using before.
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Ok. On Verizon's site the added service is HD voice. Maybe you know someone with a phone that will be compatible and pop your sim in to get HD voice added on your account.

droidrev71 said:
Ok. On Verizon's site the added service is HD voice. Maybe you know someone with a phone that will be compatible and pop your sim in to get HD voice added on your account.
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The Verizon associate popped it into his own phone and tried it, but the phone probably has to be actually added to the account I'm thinking cuz it didn't work.

dodendemise said:
The Verizon associate popped it into his own phone and tried it, but the phone probably has to be actually added to the account I'm thinking cuz it didn't work.
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Well, once your sim goes into a phone that phone will show up on your account. Then you need to go to my devices and then apps and services and add HD voice. You might need to upgrade your sim too.
I don't mind helping out but I'm trying to find out if anyone has been able to get band 4 on their U11. Each thing I've said you negate it like you know the answer. This thread was specifically made for my question.

droidrev71 said:
Well, once your sim goes into a phone that phone will show up on your account. Then you need to go to my devices and then apps and services and add HD voice.
I don't mind helping out but I'm trying to find out if anyone has been able to get band 4 on their U11. Each thing I've said you negate it like you know the answer. This thread was specifically made for my question.
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Sorry it got off topic. I'll let you know when I can actually use it. Apparently 6P had it so I swapped with my mom's phone and was able to add hd to my line. If it works I'll let you know what band I'm getting.

dodendemise said:
Sorry it got off topic. I'll let you know when I can actually use it. Apparently 6P had it so I swapped with my mom's phone and was able to add hd to my line. If it works I'll let you know what band I'm getting.
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Uh huh.

I've received my answer on band 4 and Verizon. It's not working and may never work.

droidrev71 said:
I've received my answer on band 4 and Verizon. It's not working and may never work.
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Well that sucks. That means lower speeds, another crippling of a great phone.
Curious as to where you got the answer and if there is any reasoning behind it.
Sent from my HTC U11 using Tapatalk

I bet Verizon says it is because the phone was not certified by them and as such they don't guarantee any features to work and blah blah blah when in reality it is probably their computers automatically unchecking a box on your customer record to guarantee the system will never let your device utilize the features

cmurgia said:
Well that sucks. That means lower speeds, another crippling of a great phone.
Curious as to where you got the answer and if there is any reasoning behind it.
Sent from my HTC U11 using Tapatalk
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I'm wondering where he got the answer as well. I can't seem to find any info on it.
---------- Post added at 11:09 AM ---------- Previous post was at 11:03 AM ----------
droidrev71 said:
I've received my answer on band 4 and Verizon. It's not working and may never work.
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Come on brother, don't leave us in suspense, where did you get the info.
I've downloaded the LTE Discovery app onto my HTC 10 and I'm trying to use it to see if there is Band 4 around my area, before I try out the U11.

Dragbike Racer said:
I'm wondering where he got the answer as well. I can't seem to find any info on it.
---------- Post added at 11:09 AM ---------- Previous post was at 11:03 AM ----------
Come on brother, don't leave us in suspense, where did you get the info.
I've downloaded the LTE Discovery app onto my HTC 10 and I'm trying to use it to see if there is Band 4 around my area, before I try out the U11.
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Post #99 in the Verizon thread.. He posted a bunch of info on communications with HTC, Verizon, and AT&T.

Really slow lte on mine too..looks like only band 13

Band 13 only here in Virginia.

Band 13 in Syracuse. Went back to my 10 and getting 4 consistently.

Stuck on band 13 here in Columbia, SC too. Band 4 works fine on my old One M8. HTC support has been extremely unhelpful. They keep pushing me off on Verizon. If this isn't sorted out before my return window is up this thing is going back.

"Thanks for the account verification. The HTC u11 is not capable with LTE Advanced https://t.co/JueO1hTCbK. Since this is a non-Verizon device, we can not guarantee that all features will work when comparing to a Verizon device. ^ZY
In order to use LTE Advanced, the device will need a carrier update. The HTC u11 may not be able to get the update since it is a non-Verizon device. Verizon LTE Advanced-capable devices already have the necessary hardware and software. LTE Advanced uses software to combine two or three channels – a combination of 700 MHz, AWS, and PCS spectrum to provide peak speeds. ^ZY"
Guys this is what i got after talking to VZW CS

droidrev71 said:
Anyone with issues getting band 4? At home I always have it but am stuck on band 13. Any suggestions?
The app LTE discovery will let you know what band your on.
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Same here in Miami. Only Band 13, when my s8+ used Band 4 in the same areas.
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