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Hi All,
I was recently on holidays in the USA which using my Photon Q sim modded by Cornholio I was able to get LTE on T-Mobile. This was only in areas where they have re-farmed 1900 mhz (band 2) to LTE. I'm not sure if this makes a difference but I also changed nv 6828 for 1900mz bands 2 & 25. So in theory LTE should work on AT&T where they use 1900 mhz band 2 LTE. AT&T was was coming up a lot when I was doing a network search. It is listed as AT&T 4g.
Regards,
Sebastian
cyri2 said:
So in theory LTE should work on AT&T where they use 1900 mhz band 2 LTE. AT&T was was coming up a lot when I was doing a network search. It is listed as AT&T 4g.
Click to expand...
Click to collapse
Hope you enjoyed your visit...
I've never played with any of this, but I'm an AT&T user in US... what exactly are you saying to try setting in the phone in order to try to get LTE on AT&T.... and if there's any way to know if AT&T is using that band in a particular area?
enigma9o7 said:
Hope you enjoyed your visit...
I've never played with any of this, but I'm an AT&T user in US... what exactly are you saying to try setting in the phone in order to try to get LTE on AT&T.... and if there's any way to know if AT&T is using that band in a particular area?
Click to expand...
Click to collapse
Hi,
This is what I did with my phone to get LTE was the following: Using the phone dialer
*#*#4636#*#* and in phone information menu change data to LTE/GSM/WCDMA
##3282# and in the LTE menu make sure that you have LTE as enabled, if not edit the value to enabled. You need to use the msl code for your phone to do this. I have an app to do this if you need.
To see if AT&T 1900 LTE is available in your area, go into settings, mobile network settings, network operators and choose the option search networks. A list of available networks will come up. If you have AT&T 1900 LTE band 2 available, this will be listed as AT&T 4G. Tap on this and you should be able to get LTE. The Photon Q lists LTE as 4G in the status bar on the top of the phone.
Hope that this is some help
I brought back a Pro 2 F350L from Korea because it was listed in swappa as the Att device unlocked. I took it to T-Mobile put in a sim card which automatically chose the appropriate apns. I only get 3g no lte. I have scoured the web and these forums but cant find the info that tells me wether i got the wrong device for Tmo bands. I need help either configuring the correct bands or correct radio to flash or if this device won't or can't get lte on Tmo network. I am more than happy to reward the parties or person who helps me figure out this problem. If i have the wrong phone then so be it i will get the other model (that gets tmo lte) and unload this F350L. Thanks for any and all help.
In network mode, do you have GSM/WCDMA/LTA auto to select, or just GSM/WCDMA auto?
Service Menu:
Preferred Network Mode: gsm/wcdma/lte
dejop said:
In network mode, do you have GSM/WCDMA/LTA auto to select, or just GSM/WCDMA auto?
Click to expand...
Click to collapse
Yes:
Preferred Network Mode: gsm/wcdma/lte AUTO
I have found the bands for my F350L
LG G PRO 2 F350L
WCDMA- 2100/1900/850, GSM- 900/850/1800/1900 MHZ, LTE- 1/5/3/7/17
wiseguyy said:
I have found the bands for my F350L
LG G PRO 2 F350L
WCDMA- 2100/1900/850, GSM- 900/850/1800/1900 MHZ, LTE- 1/5/3/7/17
Click to expand...
Click to collapse
Looks like you have the wrong phone ... https://support.t-mobile.com/message/435224#435224
Bottom line, for optimal utility a T-Mobile phone needs to be:
1. Quad-band GSM
2. HSPA+ on at least band 2, band 4 & band 1 (2100) for roaming.
3. LTE on bands 1, 2, 4 & 12.
TSF14 said:
Looks like you have the wrong phone ... https://support.t-mobile.com/message/435224#435224
Bottom line, for optimal utility a T-Mobile phone needs to be:
1. Quad-band GSM
2. HSPA+ on at least band 2, band 4 & band 1 (2100) for roaming.
3. LTE on bands 1, 2, 4 & 12.
Click to expand...
Click to collapse
Thanks for all your help Ill post it up on Swapa this weekend.
TSF14 said:
Looks like you have the wrong phone ... https://support.t-mobile.com/message/435224#435224
Bottom line, for optimal utility a T-Mobile phone needs to be:
1. Quad-band GSM
2. HSPA+ on at least band 2, band 4 & band 1 (2100) for roaming.
3. LTE on bands 1, 2, 4 & 12.
Click to expand...
Click to collapse
So seeing the bands I posted would the phone work for ATT? Thats a huge question because it (350L) is posted on Swappa a a ATT phone? At least I can unload it there, LOL.
wiseguyy said:
So seeing the bands I posted would the phone work for ATT? Thats a huge question because it (350L) is posted on Swappa a a ATT phone? At least I can unload it there, LOL.
Click to expand...
Click to collapse
"AT&T 4G HSPA and HSPA+ use 850Mhz(Band 5) and 1900Mhz(Band 2) bands but it all depends on area if they own a license. LTE uses Band 17(700Mhz), Band 5(850Mhz), Band 2(1900Mhz), Band 4(1700/2100Mhz) currently."
https://forums.att.com/t5/Phone-Device-Upgrades/What-are-AT-amp-T-s-4G-LTE-bands/td-p/4067288
My F350S gets LTE on AT&T.
TSF14 said:
"AT&T 4G HSPA and HSPA+ use 850Mhz(Band 5) and 1900Mhz(Band 2) bands but it all depends on area if they own a license. LTE uses Band 17(700Mhz), Band 5(850Mhz), Band 2(1900Mhz), Band 4(1700/2100Mhz) currently."
https://forums.att.com/t5/Phone-Device-Upgrades/What-are-AT-amp-T-s-4G-LTE-bands/td-p/4067288
My F350S gets LTE on AT&T.
Click to expand...
Click to collapse
So the F350S works on ATT and here are Your Phones Bands (as listed here on XDA)
LG F350S
WCDMA - 2100/1900/850, GSM - 900/850/1800/1900 MHz, LTE - 1/5/3/7/17
So will these Bands work with T-Mobile? I really love this device and I am totally hooked on the 5.9 inch screens color so I am hoping your ATT Model (The one your using) will work on T-Mobile? If it does I am more than happy to send you a few duckets
TSF14 said:
Looks like you have the wrong phone ... https://support.t-mobile.com/message/435224#435224
Bottom line, for optimal utility a T-Mobile phone needs to be:
1. Quad-band GSM
2. HSPA+ on at least band 2, band 4 & band 1 (2100) for roaming.
3. LTE on bands 1, 2, 4 & 12.
Click to expand...
Click to collapse
So will this model and bands shown below work on T-Mobile and get roaming and LTE as well?
LG F350S
WCDMA - 2100/1900/850, GSM - 900/850/1800/1900 MHz, LTE - 1/5/3/7/17
So will these Bands work with T-Mobile? Again I am more than happy to send a few duckets $ for your help getting to the bottom of my queries!
wiseguyy, I believe the phone must have band 2 and/or 4 for it to utilize TMO's LTE service. From what I've read, band 1 is used only for roaming. Read the entire thread you quoted above.
12. Re: Refarm and 4G LTE - what are the final frequencies
tmo_sean_l
Citizen Magenta
tmo_sean_l Nov 29, 2014 12:54 PM (in response to memn1)
Great discussion everyone For the most up to date info regarding our network and devices memn1 you'll want to review these links: Setup guide to Bring Your Own Device (BYOD), http://support.t-mobile.com/community/coverage/blog and http://how-to.t-mobile.com/4g-lte/, and Newsroom | T-Mobile Newsroom
Hey guys,
I'm really interested in picking up a 4c, and would be even more inclined to do so if LTE bands can be unlocked (Ideally bands 2, 4 and 12).
This has been done successfully in the past on Xiaomi devices (specifically the Mi Note Pro with the Snapdragon 810). Since the 808 shares a very similar architecture to the 810, I'm hoping it can be done on the 4c successfully.
Here are some resources and guides to start with:
http://forum.xda-developers.com/redmi-note/general/unlock-lte-bands-step-step-xiaomi-mi-t3084774
http://en.miui.com/thread-154862-1-1.html
http://forum.xda-developers.com/mi-...how-to-unlock-lte-frequency-bands-mi-t3215880
http://forum.xda-developers.com/oneplus-one/general/guide-unlock-aditional-bands-qualcomm-t2877031
http://www.xda-developers.com/remove-band-restrictions-qualcomm/
Hopefully someone with a Mi 4c is able to try and confirm their success!
That's very interesting! I wish also band 20 (800 MHz) could be unlocked since it's largely used in Europe.
Mee too interested to unlock (if possibile) 800 mhz
One more interested in the 800. :good:
B4 (AWS)
Im up for B4 (AWS) :good:
doesn't have it unlocked but it seems it makes really no difference. Don't trust the few articles from people who did not even test...
I have LTE bands everywhere (work, home, way between) and I live in a zone where it is kinda hard to get...
exploreresp said:
doesn't have it unlocked but it seems it makes really no difference. Don't trust the few articles from people who did not even test...
I have LTE bands everywhere (work, home, way between) and I live in a zone where it is kinda hard to get...
Click to expand...
Click to collapse
It depends a lot on what network you're on. The LTE bands that come enabled by default on the 4C don't support any US networks.
800 mhz (band 20) would be great
What LTE bands does mi4c support?
Does anyone know what LTE Bands the Xiaomi mi4c supports out of the box?
Been struggling to find a reliable source/list
boonkoh said:
Does anyone know what LTE Bands the Xiaomi mi4c supports out of the box?
Been struggling to find a reliable source/list
Click to expand...
Click to collapse
2G GSM 850/900/1800/1900MHz; CDMA BC0/BC1
3G WCDMA 850/900/1900/2100MHz; CDMA BC0/BC1
4G FDD-LTE: 1800/2100/2600MHz; TDD-LTE: Bands 38(TD 2600) / 39(TD 1900) / 40(TD 2300) / 41(TD 2500)
800MHz?
Hi,
Bought mi4c to find out that I can't get LTE working in my village
I live 12kilometers from a bigger city. There is LTE available in my village but I think they operate on 800MHz and in city at 1,6GHz.
I dreamed about using my new 4g connection here after 3years with Galaxy S3
I have to try these guides. Thank you for providing them.
Regards,
Noboby tried to unluck bands?
Wouldn't advise in case it bricks the phone. If there is a way to unbrick, then go for it it
ermacwins said:
Wouldn't advise in case it bricks the phone. If there is a way to unbrick, then go for it it
Click to expand...
Click to collapse
In Snapdragon phones there is always a way to unbrick but it could be very frustrating and time intense
I have tested it on many of my snapdragon phones.
On some phones, it works flawlessly. On other, the signal strength is weaken but works nevertheless. However, some phones especially carrier ones have anti tampering mechanism which reverts the value back to original after restart. However, usually this is solved by a custom kernel and custom rom but then again, it gets really tough to get into diag mode in custom modes.
Never had any problems.
But you MUST backup your EFS partition via recovery or using QPST / QXDM else you would have a lot of problems if you messed up the values like no signals or broken wifi or sensors etc. and SAVE them on your phone as well as on your PC. (at least two backups)
As long as you take the above two precautions, you will never mess up your phone!
Its supports LTE band 3 and 7 which is mostly used in europe, middle east and asia. However even after you select "Prefer LTE" from the setting it might not connect.
You can try this (this will change on reboot so will try to see if i can change within the code):
1. Enter *#*#4636#*#* in the diapad.
2. Select phone information 1 (there are two sims so select the first one)
3. Change to LTE/WCDMA (if it doesn't connect to LTE then try "LTE only" and then change it to LTE/WCMDA)
If the above doesn't connect to LTE then your carrier is offering LTE at a different frequency.
For me atleast the default APN were wrong, so i had to manually change the APN restart and then do the dialer thing.
regspy said:
3. Change to LTE/WCDMA (if it doesn't connect to LTE then try "LTE only" and then change it to LTE/WCMDA)
Click to expand...
Click to collapse
There is NO LTE/WCDMA option only. Please see screenshot and point out what option I'm supposed to pick
screen shot of "phone information 1" --> http://imgur.com/BELHKaO
Which one of those am I supposed to tap on?
I picked "TD-SCDMA, WCDMA and LTE" but that broke network connectivity.
EDIT: Please also take a look at this: http://imgur.com/gallery/yzIHD49
I am currently connected to "3 ITA 3G" and would like to connect to "3 ITA 4G" but tapping on that makes a pop up appear "Registered on network". However no 4G appears in the bar on top. It remains stuck in 3G or H+.
3 ITA doesn't have LTE on band 20 [8oo Mhz LTE].
So why aren't I picking up 4G?
@AndrewIT im not in italy, however from Wiki it seems your carrier supports 4G on band 3 (1800).
select the "3 ITA 4G", then follow my steps. You have to scroll up that list in screenshot http://imgur.com/BELHKaO and you'll see "LTE only" and "LTE/WCDMA" option.
regspy said:
@AndrewIT im not in italy, however from Wiki it seems your carrier supports 4G on band 3 (1800).
select the "3 ITA 4G", then follow my steps. You have to scroll up that list in screenshot http://imgur.com/BELHKaO and you'll see "LTE only" and "LTE/WCDMA" option.
Click to expand...
Click to collapse
Thank you! I was finally able to see the 4G icon on my Mi4c.
Entered *#*#4636#*#* in the diapad.
Selected phone information 1 (there are two sims so select the first one)
I scrolled up [see screenshot] and set WCDMA and LTE from the list.
Screenshot: http://imgur.com/OJ98uQi
You can see that I successfully picked up 4G signal, but it was extremely poor, only one bar standing close to a window.
As I move inside the house it loses 4G and gets back to 3G or H+.
It seems that I'm way too far from the LTE antenna to get a good 4G signal.
Guys I am kinda lost here, so is there a good chance that it supports especially 800Mhz band or not ? And when I am here, is there hardware difference between TDD-LTE and FDD-LTE version? How do I find out which one I have ?
Hello,
I've got a LG Phoenix 2(K371) phone that I bought from Bestbuy and unlocked through AT&T
The phone is supposed to support the UMTS B1(2100 Mhz) frequency (as stated in specs).
I'm in North Africa right now for a business trip and unfortunately I wasn't able to get any 3G data with the local carrier that uses the UMTS 2100 Mhz frequency, I'm stuck with only 2G while my other phone works just fine.
I tried to change my Network Mode from 4G to 3G but the Network mode menu is missing!!!!!!
My questions are:
1- Does the K371 really supports the UMTS 2100 Mhz frequency ?
2- How can I change my Network mode from 4G/Lte to 3g/WCDMA?
Thanks
Did you ever get this sorted out? I am in Germany and can only get 2G also.
Same here in the UK! Only 2G.
My understanding is that either the official specifications of the phone are wrong - it doesn't support the HSDPA frequency of 2100 MHz, or (most likely) this frequency is disabled in the phone software settings since [email protected] doesn't use this frequency in the US. In any case it is very frustrating: I bought this phone convinced it is going to work while I am travelling in Europe, but obviously it doesn't as 2G data connection is useless.
Same problem in SE Asia. Phone doesn't have the right LTE bands but HSPC should work. Only getting 2G. No option in the hidden menu to change the modem RAT settings that I can see. *#546368#*371#
Anyone have any luck using the k371 overseas?
Same here...
I tried every single method I know in hopes that I could root the phone, but no luck!!!
I believe at&t disabled the said frequencies....
Our only bet is a proper root, and a custom rom..
any update on no UMTS 2100Mhz?
any solutoion on this issue?
I have found a solution. I am using it outside the US. I contacted my cellular provider, gave them the phone name (LG K371) and they sent me a text message with automatic settings for their data network. As soon as I opened it, I got a message like "data settings have been updated" and now it works on 3G and 4G without any issues. You may also be able to find these data configuration settings on your cell service provider's web site.
Seriously???
Please let me know is it AIRTEL service? since i am from INDIA.
we have the same problem in 2 mobiles..
Hmmm
I tried of calling and received setting for MMS , GPRS, INERNET but still i m seeing 2G symbol as E - edge detection
Please help me
Hi this is sainath
am also facing same problem, any one got solutions
please give reply.
tromal said:
Hello,
I've got a LG Phoenix 2(K371) phone that I bought from Bestbuy and unlocked through AT&T
The phone is supposed to support the UMTS B1(2100 Mhz) frequency (as stated in specs).
I'm in North Africa right now for a business trip and unfortunately I wasn't able to get any 3G data with the local carrier that uses the UMTS 2100 Mhz frequency, I'm stuck with only 2G while my other phone works just fine.
I tried to change my Network Mode from 4G to 3G but the Network mode menu is missing!!!!!!
My questions are:
1- Does the K371 really supports the UMTS 2100 Mhz frequency ?
2- How can I change my Network mode from 4G/Lte to 3g/WCDMA?
Thanks
Click to expand...
Click to collapse
Sorry for a late reply, but here's the real scoop about the LG K371 (AT&T)
First, being a "cheap" LG phone, there are very few bands actually included, and they only cover the main (not all) AT&T US frequencies, therefore it's no surprise that doesn't work on all overseas carriers. Again, they are covering only major US bands, and despite what it shows on the box or specs it may not be always true. B1 (2,100Mhz) band has different sub-bands, therefore it doesn't mean that the US B1 will work on an overseas B1, let alone the air-interface (2G/3G/4G/LTE) may not all be supported even if this sub-band exists.
Second, being that it's an AT&T phone, they are knows to load firmware with major restrictions for band selection called RAT Restrictions, which cannot be undone unless you can reflash it with a non-customized firmware, but you can't do that either due to the locked bootloader. A better option is to always go with the un-customized or Tmobile K7/K8 because they always have a lot more bands enabled than the AT&T version. Better yet, go with a Samsung which have more bands even on the AT&T models.
Bottom line, "cheap" phones along with AT&T restrictions will not work everywhere, despite the specs, and there's nothing you can do about it.
And my favorite old adage is "You get what you pay for!" LOL
Hi everyone,
I'm having a couple of issues with my H830 that I'm trying to clear up.
1. Besides having the "Device Unlock" app showing up on your phone, how else can you tell if your phone is actually still carrier locked? I ask because I purchase mine used and it was locked. I did not insert a SIM, ran the unlock app, did a permanent unlock attempt, and it appeared to work. After I completed that, I downgraded, rooted, and updated to the current 20n. I had a few unrelated issues and decided to unroot/lock bootloader/reflash to stock. After I got things back to 100% stock everything, I show the "Device Unlock" app again. However, my SIM is Straight Talk AT&T and its working (mostly, that's the next question). Calls work, messages work, and data (mostly). If I was truely still carrier locked, wouldn't this not happen? Is there a warning I should be getting?
2. I believe I've seen others who have experiences issues when using an H830 with Nougat on AT&T networks, something about Band 17 being broken/disabled. Regarding my current situation from question 1, data is acting weird. If I leave the network mode setting on ""GSM/WCDMA/LTE auto", I seem to get a trickle of data - emails seem to come through, and little bits of websites come through. If I switch to "GSM/WCDMA auto" like I've seen listed in other places, data seems to work as you'd expect other than being on a slower connection. Has anyone else had this problem and resolved it?
sorry, looks like i posted in the wrong board. could a mod maybe move this to "Questions & Answers" board?
As an update, if anyone cares - I've managed to use the phone on multiple different carriers between US, China, and Taiwan. My issue here in the US is due to the network mode - I guess the band AT&T uses around here is not supported by the phone currently.
sqkid89 said:
As an update, if anyone cares - I've managed to use the phone on multiple different carriers between US, China, and Taiwan. My issue here in the US is due to the network mode - I guess the band AT&T uses around here is not supported by the phone currently.
Click to expand...
Click to collapse
If you have an H830 that is an Tmobile Specific G5
ATT version is H820
Tmobile uses this channels or Freq bands
Freq Band
1900 MHz 2
1700/2100 MHz 4 AWS
850 MHz 5
700 MHz 12
600 MHz 71
----------------------------------------------------
ATT uses
LTE band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 9(1800), 17(700), 18(800), 19(800), 20(800), 28(700), 29(700)
38(2600), 39(1900), 40(2300), 41(2500)
the H830 dont have as many bands as ATT needs , so when there is no ATT LTE bands your phone switches to 2g hence slowwww data speed
If you want full speed on ATT network, get an H820
i do not fully get why you want to use a Tmobile headset on the ATT network
Hope this little explanation helped you
Max.
sqkid89 said:
Hi everyone,
I'm having a couple of issues with my H830 that I'm trying to clear up.
If I switch to "GSM/WCDMA auto" like I've seen listed in other places, data seems to work as you'd expect other than being on a slower connection. Has anyone else had this problem and resolved it?
Click to expand...
Click to collapse
So I to am also using a using an "unlocked" T-mobile Lg G5 with an AT&T StraightTalk Sim from the Bring Your Own Phone Package which has been an absolute nightmare. Love the phone but not the data problems connection problems ...even been ridiculed by an iphone x enthusiast that is in your face annoying about the iphones. I wanna root, fix problems, and show him what a real operating system can do . :highfive:
---------- Post added at 08:10 AM ---------- Previous post was at 08:05 AM ----------
maxolini said:
If you have an H830 that is an Tmobile Specific G5
ATT version is H820
Tmobile uses this channels or Freq bands
Freq Band
1900 MHz 2
1700/2100 MHz 4 AWS
850 MHz 5
700 MHz 12
600 MHz 71
----------------------------------------------------
ATT uses
LTE band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 9(1800), 17(700), 18(800), 19(800), 20(800), 28(700), 29(700)
38(2600), 39(1900), 40(2300), 41(2500)
the H830 dont have as many bands as ATT needs , so when there is no ATT LTE bands your phone switches to 2g hence slowwww data speed
If you want full speed on ATT network, get an H820
i do not fully get why you want to use a Tmobile headset on the ATT network
Hope this little explanation helped you
Max.
Click to expand...
Click to collapse
I am using the at&t sim cause straighttalk suggested it and tmobile has horrible coverage is iowa. you cant fine a tmobile dealer for 50 miles in every direction of me.
maxolini said:
If you have an H830 that is an Tmobile Specific G5
If you want full speed on ATT network, get an H820
i do not fully get why you want to use a Tmobile headset on the ATT network
Hope this little explanation helped you
Max.
Click to expand...
Click to collapse
I'm well aware there are differences in bands; my area apparently doesn't use the same 4g bands as ATT. In many areas, TMobile does, so its not an issue. If you want a G5 that could be unlocked, rooted, and run a custom OS without much trouble, H830 is the way to go. I just wanted to make sure others looking to do the same didn't think they got a bad or locked phone.
Anyone in or around new york using it?? Do you get LTE and 3g?
OP, I don't seem to understand your issue or situation. I will assume you experience poor connectivity with your H830 model on AT&T including intermittent LTE drops, losing LTE after calls, 3G/H+ only, and poor service/coverage. AT&T white-lists devices which can use LTE on their network, and while they may connect, they will get dropped to 3G/2G GPRS after a while. These white-listed devices ONLY include AT&T models of phones, and SOME unlocked phones. This is an issue many OnePlus, Nexus, and Huawei users experience with AT&T. Even though device is unlocked, LTE is gone after a while or never loads. Some have suggested to call AT&T or chat via tech support to whitelist your IMEI on their system, which will take a while to reach the correct person. What I ended up doing was switching to T-Mobile from my MVNO TracFone because they told me AT&T claimed my device was not capable of LTE (These included: G4 H811, G5 RS988, and G5 H830). As for band compatibility, it should not be an issue. AT&T supports bands 2, 4, and 12/17 (29 & 30 are rare), they just added band 12 compatibility 1-2 years ago to gain more customers from T-Mobile but it's working against them because of their LTE whitelist.
maxolini said:
If you have an H830 that is an Tmobile Specific G5
ATT version is H820
Tmobile uses this channels or Freq bands
Freq Band
1900 MHz 2
1700/2100 MHz 4 AWS
850 MHz 5
700 MHz 12
600 MHz 71
----------------------------------------------------
ATT uses
LTE band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 9(1800), 17(700), 18(800), 19(800), 20(800), 28(700), 29(700)
38(2600), 39(1900), 40(2300), 41(2500)
the H830 dont have as many bands as ATT needs , so when there is no ATT LTE bands your phone switches to 2g hence slowwww data speed
If you want full speed on ATT network, get an H820
i do not fully get why you want to use a Tmobile headset on the ATT network
Hope this little explanation helped you
Max.
Click to expand...
Click to collapse
Thank you for that data, i did not know this. I will be switching back to a Tmobile MVNO next month. I am with Red Pocket so I can choose either carrier.
I was at a restaurant yesterday and my LTE was SUPER slow and I was wondering why it is slow sometimes and fast other times even with full bars (strong signal)
patato21 said:
OP, I don't seem to understand your issue or situation. I will assume you experience poor connectivity with your H830 model on AT&T including intermittent LTE drops, losing LTE after calls, 3G/H+ only, and poor service/coverage. AT&T white-lists devices which can use LTE on their network, and while they may connect, they will get dropped to 3G/2G GPRS after a while. These white-listed devices ONLY include AT&T models of phones, and SOME unlocked phones. This is an issue many OnePlus, Nexus, and Huawei users experience with AT&T. Even though device is unlocked, LTE is gone after a while or never loads. Some have suggested to call AT&T or chat via tech support to whitelist your IMEI on their system, which will take a while to reach the correct person. What I ended up doing was switching to T-Mobile from my MVNO TracFone because they told me AT&T claimed my device was not capable of LTE (These included: G4 H811, G5 RS988, and G5 H830). As for band compatibility, it should not be an issue. AT&T supports bands 2, 4, and 12/17 (29 & 30 are rare), they just added band 12 compatibility 1-2 years ago to gain more customers from T-Mobile but it's working against them because of their LTE whitelist.
Click to expand...
Click to collapse
Sorry for the repeat delayed responses, been away and not getting alerts.
I had a few issues to begin with that were hard to determine due to multiple issues/changes/whatever. Normally I try to do one thing at a time, but I messed that up for myself. Between forum searches are real world testing, I was able to figure them out, so putting them all in one place may be helpful to someone else.
1. I had SIM unlocked my phone prior to downgrading and trying out custom roms. When I wasn't getting LTE, I thought I may have screwed something up and returned everything back to stock. In the process, the "SIM Unlock" app came back and I assumed I may have somehow relocked things. Turns out that's not the case, as I've used an AT&T sim from Straight Talk ever since and others for work in both China and Taiwan. I'd love to get rid of some of the LG/T-mobile bloatware, but I fear breaking anything if I remove this app, so I'll just leave well enough alone.
2. LTE - I was getting no data use at all originally. I couldn't confirm if this was due to a defective phone, being SIM locked, or something else. On my business trips overseas, I was able to get LTE, so it appears to be the band/whitelisting issue as you and others have mentioned. In order to semi-solve my issue, I switched my Network Mode (Settings > Connectivity > More > Mobile Networks) to "GSM/WCDMA auto". I don't get LTE speeds, but 4g works well enough for me as-is. If I ever get around to it, I'll just snag a new Straight Talk sim for t-mobile (although I get shivers any time I even think about having to deal with their customer service department)