Related
I've experimented with just about every ROM available within this community. I'm currently running Mikey's i9000 ROM. I'm pretty experienced and safely say that I've always flashed in the appropriate manner, including usage of the JG8 modem in obtaining 850mhz. Where I live (Hampton Roads, VA), we don't actually have 850mhz, but at my in-laws house (D.C. Metro Area) we do, so I wanted to have 850mhz available if needed. This is the first weekend I've actually been in the D.C. area to test out the 850mhz band. When I got here, I checked right away - 1900mhz, Band 2. I rebooted and checked again right away - 850mhz 5.
After finally looking at a damn coverage map, I see Hampton Roads doesn't have 850mhz anywhere nearby. I've also read that there is some (unscientific) evidence that 1900mhz to 850mhz hand-offs could be a partial cause of the random shut down issues. Long story short for me, at least, is that I don't think I'll need 850mhz all that often after all.
Here's where I get confused. I went back into *#2263#, went to WCDMA and chose 1900mhz only to clear the selection off 850mhz in Combi. I then went to Combi and reselected everything but the WCDMA 850mhz band. I then selected Automatic band selection to clear my selection of the WCDMA only band. Finally, I went back to COMBI and confirmed that 850mhz WCDMA was not selected. I rebooted and immediately checked *#0011#: 850mhz 5. I went back to *#2263# and COMBI bands still does not have 850mhz selected.
Perhaps I messed up somewhere, but if so, my screwup resulted in the JG8 trick doing pretty much exactly what it's supposed to. My real question is what the heck does actually changing anything in COMBI do? It clearly made no difference when I chose AUTOMATIC. I suppose AUTOMATIC, on my phone at least, really does literally use ALL bands. Across all of the ROMs and modems I have tried I've never been able to actually select COMBI as the band method. I can manipulate COMBI's entries, but I can only actually *select* AUTOMATIC, WCDMA or GSM.
Can anyone else confirm this to be the case or their experience? At the end of the day, if you want 850mhz then the JG8 dance clearly did the trick. The only way I've been able to get rid of 850mhz is to choose WCDMA 1900 ONLY.
A few final notes: I'm currently using the JPM modem, though this has been my experience for the most part with any included modems. Also, I'm not trying to vent or *****. I realize that if I don't want 850mhz I could just not flash JG8 over, and I'm ok with that. I'm trying to understand why my phone exhibited this behavior, as well as whether it matters one bit what I do in COMBI going forward.
Really? Nobody?
I'm starting to doubt my ability to provide relevant contributions to this community.
I am not sure why you would want to limit your phone to 1900 only. The reasons why the two are used depends on geography, population density and most important whether att even has licensing to 850 in an area or even some whole states for that matter. 850 is much better at penetrating structures and such so often times people can connect to one or the other depending on whether they are outside or in their house or office.
Ideally both would be available and your modem would select the strongest....thus reducing battery consumption. Where I am located, we have both and I dont see the handoff reboot issue...though I know in some setups it has occurred but not in the newer roms
Btw...love that area, used to live in chesapeake though I dont miss the whole personal property tax crap, or whatever they called it, and the fear of an inch of snow bringing out the inability of people to drive on a semi slick surface....
newter55 said:
I am not sure why you would want to limit your phone to 1900 only. The reasons why the two are used depends on geography, population density and most important whether att even has licensing to 850 in an area or even some whole states for that matter. 850 is much better at penetrating structures and such so often times people can connect to one or the other depending on whether they are outside or in their house or office.
Ideally both would be available and your modem would select the strongest....thus reducing battery consumption. Where I am located, we have both and I dont see the handoff reboot issue...though I know in some setups it has occurred but not in the newer roms
Btw...love that area, used to live in chesapeake though I dont miss the whole personal property tax crap, or whatever they called it, and the fear of an inch of snow bringing out the inability of people to drive on a semi slick surface....
Click to expand...
Click to collapse
Yeah, we just moved here from the D.C. area and I really, really like it.
As to why I would want to limit 850 on my handset...I had read some posts where people claimed that one potential reason for random shutdowns were 1900 to 850 handoffs. I've found that if that is correct, it wasn't the cause in my case. I've re-enabled 850 because, well...why not?
But I'm still left curious about the COMBI band thing. Just on principle...if I've deselected 850 in COMBI, chosen AUTOMATIC and rebooted...why is my phone still connecting on 850?
It is a mystery just as why you can not just enable 850 using those settings. Why jg8 performs this voodoo magic I dont know...what I do know is I tried everything a while ago when trying to run i9000 roms when I noticed this phenomenon and passed it along to boomerod who tested and confirmed. At the time there was not a lot of discussion about it but I had to have 850 working as I barely see 1900 at home but 850 is awesome strength....now it is standard protocol for installing i9000 but we still have not heard an explanation from any expert
Obviously changing those settings really does nothingand I cannot tell you why
On my Captivate, I could customize the radio to remove and add bands. Is there a way to do this on the Inspire? I live in an area where we have so many towers that even though I'm considered in the "best" coverage zone, my phone rapidly hops towers. Setting my Captivate to use the 1900 band only eliminated this issue entirely.
I may have to return the phone if I can't do this because I constantly drop calls and data. The worst is when I am on a phone call - it will go from HSPA to EDGE and then the data connection icon disappears entirely until I get off the phone and/or the call drops - my Captivate did this as well until I set it as 1900 only.
I think one of the custom roms had this option, just can't remember which one. I know one of the desire based roms had a selection setting to force it to one or the other or to set it to automatic.
Sent from my Desire HD using XDA Premium App
stryfe2010 said:
I think one of the custom roms had this option, just can't remember which one. I know one of the desire based roms had a selection setting to force it to one or the other or to set it to automatic.
Sent from my Desire HD using XDA Premium App
Click to expand...
Click to collapse
I would be extremely interested in this. I am considering making a post in development about it because seriously, I am sick of trying to make a call and it fails because there is no signal, then I wait 30 seconds and I have full signal, get on the call, and it drops out.
This would be sweet to have, my phone is constantly doing the dame thing.
Sent from my Inspire 4G using XDA Premium App
Jake06 said:
This would be sweet to have, my phone is constantly doing the dame thing.
Sent from my Inspire 4G using XDA Premium App
Click to expand...
Click to collapse
Honestly, its a trade off - on my Captivate, I have to lock it as WCDMA 1900 - which means that when I drive somewhere that DOESN'T have 1900 (pretty rare in Colorado) AND HSDPA or 3G, I can't make a call but switching the band takes all of 5 seconds. I can tell you that 1900 here at home though locks and doesn't let go whereas 850 does. My SIM is currently in my Captivate because I'm going to call them and try to make a case for a microcell again.
On your phone, dial *#*#4636#*#* ...then select "Phone Information"
In this menu, you can change and set several things, including which band you use. This is on EVERY android phone, regardless of the ROM. You change these settings at your own risk.
EtherealRemnant said:
I would be extremely interested in this. I am considering making a post in development about it because seriously, I am sick of trying to make a call and it fails because there is no signal, then I wait 30 seconds and I have full signal, get on the call, and it drops out.
Click to expand...
Click to collapse
Don't return it cause of that..! I've already got the 1900/850(wcdma/gsm) toggle in my sense rom, I just haven't included it yet cause I'm working on a 3g/edge toggle as well, and wanted to have both together, but since people want that wcdma/gsm toggle now ill finish it up 100% this weekend hopefully, update my rom with it and post just that by itself so people on other roms can use it as well.
850MHz has WCDMA as well... Setting it to WCDMA/GSM is irrelevant, as you can be on 850 and still on WCDMA.
You have to be able to specify the 1900MHz or 850MHz bands themselves if that is all you want; rather than the auto-switching the phones are supposed to do.
id10terrordfw said:
850MHz has WCDMA as well... Setting it to WCDMA/GSM is irrelevant, as you can be on 850 and still on WCDMA.
You have to be able to specify the 1900MHz or 850MHz bands themselves if that is all you want; rather than the auto-switching the phones are supposed to do.
Click to expand...
Click to collapse
That is exactly what I want. I want to force the 1900 band only. On my Captivate, the only way to do this was to force WCDMA 1900 OR GSM 1900, there was no way to have GSM AND WCDMA 1900 because of how Samsung set up the frequency manager.
I'll try the *#*#4636#*#* mentioned earlier.
The phone doesn't respond to anything I set in *#*#4636#*#* - it automatically reverts back to HSDPA.
I also figured out my problem. Using OpenSignal, I did a tower map. As I thought, I have too many towers. There is one tower that is literally at the top of my block that gives me the worst signal and there are two other towers it connects to - one of them is about 4 blocks away from the other tower and gives me an okay signal and the other one is about a mile away and that gives me the best signal but it doesn't stay locked to any specific tower. Even sitting in the exact same spot, it keeps jumping around.
Oh and you can only select "USA bands", not individual bands from that menu as well
I can only use edge(gsm) 850 band in my office, rest of them don't work.
I used to select it very easily on my captivate using the *#2263#, but there is no such thing on Inspire 4G. Is there anyway to do the same on Inspire 4g??
ravishahuja said:
I can only use edge(gsm) 850 band in my office, rest of them don't work.
I used to select it very easily on my captivate using the *#2263#, but there is no such thing on Inspire 4G. Is there anyway to do the same on Inspire 4g??
Click to expand...
Click to collapse
You mean this?
*#*#4636#*#*
Sent from my calculator
on Captivate i could *#2263# and toggle between bands. GSM/3G or 850/1900.
kirk123 said:
You mean this?
*#*#4636#*#*
Sent from my calculator
Click to expand...
Click to collapse
on Captivate i could *#2263# and toggle between bands. GSM/3G or 850/1900.
On inspire *#2263# doesn't work. I tried *#*#4636#*#* as well. If i try to change bands it again defaults back to WCDMA. I can never switch to GSM bands.
If you live in a major area then its not uncommon to have up to 12 monitored cell sites capable of serving your phone.
I have both bands as well, and here is some info that may be of interest:
In areas that have both, there is a rather seemingly obscure pecking order:
Havoc is caused due to this:
Phone has every band available to it. Great! or, not really.
Here is the election process:
Tower sends out its info on the 850 wcdma carrier announcing as primary.
Tower sends out its SAME info on the 1900 wcdma carrier as secondary.
GSM primary is 1900 for association, 850 for data / voice with roll back to 1900.
The phone sends a limited amount of data to the towers when it hooks up, and in this data is the list of "Ranked" cell site ID's. (WCDMA ONLY, forget GSM for now)
The tower then is aware of what other sites can serve you should it become to busy. Using this and various factors, it will decide to either keep you on sector X primary, bump you to secondary carrier, or dump you completely. If it dumps you completely it is a forced hand off and not a graceful one, and you drop signal completely momentarily and then gain it back, but connect to a different cell id. However, that NEW cell ID only hears you at -104, useable but weak, and has 300 other phones it hears at -80 or better.. It has to pick some one to drop, and it picks you. Start the cycle all over again.
Disabling the 850 band stops this, because 1900 goes far shorter of a range and has far less people using it typically.. therefore the stronger site doesnt drop you because your phone reports no where to go. It also (in the case of the captivate) does not respond to requests to switch to GSM, as it will report no gsm availability when in forced wcdma mode.
Fundamentally, this is a misconfiguration on AT&T's part, since this little scenario shouldnt happen with proper sector alignment and tilting.
You did mention that you are in colorado, and AT&T has absolutely NO idea how to deal with radio towers and mountains. They seem to forget that not the entire world is flat.
If it is an option, I'd recommend a switch to Verizon, as it is unlikely this particular problem will ever go away.
Also, as to a Micro-Cell, know going in that those little buggers get the lowest possible priority.. meaning that if your phone can hear a real tower, its going to use that first. You'll have to fight it to get it on the m-cell.
Also, all Micro-Cell's are WCDMA 850 only, with no GSM or WCDMA 1900.
They also do not use HSPA, but instead use older UMTS technology (Who really cares at this point, if you are in range of a M-Cell you can use wifi.)
Other option: Disable 3G for the area you would use the M-Cell.
GSM shouldnt give the same problem WCDMA gives. The entire election process is completely different, and frankly works better than the WCDMA deployment AT&T used.
EDIT:
Wow sorry I didnt read the dates else I would have known this thread was a corpse. Found it looking for a WCDMA 1900 inspire lock option.
Dear All,
I recently got this device in Hong Kong and is hapi with its performance!
But I am still wondering if this device could actually use the LTE available in HK?
I knw the msm8960 claimed to be capable of utilizing all frequency of radio,
so is it possible that there is some soft lock in the baseband?
Could i flash the baseband or replace the modem driver from other device to access other frequency?
any idea is appreciated!
Thanks!
Vasco
I think it has to modifiy the ROm and the hardware
I tried to figure out, if our Photon Q is supporting more LTE bands than 1900 MHz (#2 or/and #25).
-> http://en.wikipedia.org/wiki/E-UTRA#Frequency_bands_and_channel_bandwidths
On some sites there are reports for having another band. (Have to search again, I think it was 850 MHz, #26 or 700 MHz, #12/#17/#29.)
I have also searched for supported frequencies for MSM8960.
I found some BlackBerry devices based on that SoC and 2 different versions of supported LTE bands.
One version (UK) supported 4 in europe used bands und the other version (US) supported 4 in US/Canada used bands.
I think that the Photon Q is like the BlackBerry US version and supports 4 LTE bands in US/Canada.
If you need a few sites, I will search again and show it to you.
The strange thing is, if I set to LTE only (via 4636) I can see all 4 carrier (germany).
We have 3 bands with LTE on it, but I can only get signal to max 2 of them.
Band 3, 7 and 20 (1800, 2600, 800 MHz).
The weird thing is, that on band #20 (800 MHz) only 3 carrier are active, so it has to be band #3 or #7.
Maybe I'm missinterpreting things and thats just a sideeffect of crossing bands of LTE US and UMTS Germany.
On stock ROM there was another "secret phone code" to see what the phone-part is doing. (From qualcomm I believe.)
I think I will test it some other day, to see which band is active.
At last, I was never been able to "login" or "register" into my carriers network within LTE.
Please discuss about that possibility, I really want to find out, which frequencies are supported by our phone on LTE.
Loader009 said:
I tried to figure out, if our Photon Q is supporting more LTE bands than 1900 MHz (#2 or/and #25).
-> http://en.wikipedia.org/wiki/E-UTRA#Frequency_bands_and_channel_bandwidths
On some sites there are reports for having another band. (Have to search again, I think it was 850 MHz, #26 or 700 MHz, #12/#17/#29.)
I have also searched for supported frequencies for MSM8960.
I found some BlackBerry devices based on that SoC and 2 different versions of supported LTE bands.
One version (UK) supported 4 in europe used bands und the other version (US) supported 4 in US/Canada used bands.
I think that the Photon Q is like the BlackBerry US version and supports 4 LTE bands in US/Canada.
If you need a few sites, I will search again and show it to you.
The strange thing is, if I set to LTE only (via 4636) I can see all 4 carrier (germany).
We have 3 bands with LTE on it, but I can only get signal to max 2 of them.
Band 3, 7 and 20 (1800, 2600, 800 MHz).
The weird thing is, that on band #20 (800 MHz) only 3 carrier are active, so it has to be band #3 or #7.
Maybe I'm missinterpreting things and thats just a sideeffect of crossing bands of LTE US and UMTS Germany.
On stock ROM there was another "secret phone code" to see what the phone-part is doing. (From qualcomm I believe.)
I think I will test it some other day, to see which band is active.
At last, I was never been able to "login" or "register" into my carriers network within LTE.
Please discuss about that possibility, I really want to find out, which frequencies are supported by our phone on LTE.
Click to expand...
Click to collapse
Dear Loader009,
Thanks for your information! I'm really impressed that you could actually search the carrier in 'LTE only from Germany!
Could you please share the version of ROM you are using?
And if possible, any screenshot? I really want it can be used in HK with LTE(1800, 2100 & 2600Mhz)
Also do you have more information about the secret phone code? I think it would be interesting
Actually, I noted that xt925 and xt905 are using the same chip MSM8960 with LTE usable in HK.
Is there anyone can locate the radio/baseband of their rom and port it for XT897?
I am willing to try it with my machine.
If this work, I think we could use this photon q all over the world!
Any idea?
Regards,
Vasco
disablewong said:
Dear Loader009,
Thanks for your information! I'm really impressed that you could actually search the carrier in 'LTE only from Germany!
Could you please share the version of ROM you are using?
And if possible, any screenshot? I really want it can be used in HK with LTE(1800, 2100 & 2600Mhz)
Also do you have more information about the secret phone code? I think it would be interesting
Actually, I noted that xt925 and xt905 are using the same chip MSM8960 with LTE usable in HK.
Is there anyone can locate the radio/baseband of their rom and port it for XT897?
I am willing to try it with my machine.
If this work, I think we could use this photon q all over the world!
Any idea?
Regards,
Vasco
Click to expand...
Click to collapse
Of course, I was just blind guessing the hardware for xt926 and xt907 are using the same hardware.
If not, there should be one chip controlling the modem channel of the device to be replaced.
But WHICH ONE???
Any expert in this area can solve this question? I am a dummy for radio stuffs
This seems like it's getting pretty interesting.
Sent from my XT897 using Tapatalk 2
Dear all,
I'm also very interested in this topic since I imported a Photon Q to Germany and was wondering if it's possible to use the local LTE 800/1800/2600 bands.
I think the first thing we have to find out is whether the hardware is capable of using other bands than the 1900 band listed on the Motorola website. As Loader009 states he could see LTE carriers which are known to use different bands I assume the hardware can do it. Otherwise the carriers wouldn't have been listed, right? Maybe someone from another country with different frequency bands can check and confirm that he can see those carriers as well?
Thus, the limitation to the 1900 band should be software-made and could be modified by a developer. I hope someone can participate at that point as I don't know much about coding...
I'm using CM10.1.
I can't remember the secret phone code, I have to do research again.
This secret phone code only works on Stock ROM. (I stupidly deleted it, when it wasn't working on CM10 anymore.)
The one secret phone code I used to force "LTE only" was *#*#4636#*#*.
Please DON'T change the baseband (don't even tap on it).
This can do problems to you. (I had to use QPST to recover the supported frequencies.)
Also, developers (afaik) can't modify the modem firmware.
We also don't even know, which LTE bands the Photon Q is capable of. (Except 1900 MHz)
I've got my 32GB SDCard back and will test it in the next few days out.
I hope I'll find that secret phone code, I'll also make a few screenshots.
Got the code!
##33284# <- ##DEBUG#
It only works on stock afair!
I'll test tomorrow, it's about 3am now >.<
disablewong said:
Dear All,
I recently got this device in Hong Kong and is hapi with its performance!
But I am still wondering if this device could actually use the LTE available in HK?
I knw the msm8960 claimed to be capable of utilizing all frequency of radio,
so is it possible that there is some soft lock in the baseband?
Could i flash the baseband or replace the modem driver from other device to access other frequency?
any idea is appreciated!
Thanks!
Vasco
Click to expand...
Click to collapse
I have read the "QU_SnapdragonS4_White_Paper_FNL_Rev6.pdf" and found there following entry:
-----------------------------------------------------------
• Industry’s first fully integrated 3G/4G world/multimode LTE Modem: <<<Supports all of the world’s leading 2G, 3G and 4G LTE standards>>>.
It also includes integrated support for multiple satellite position networks (GPS and GLONASS) as well as short range radios via Bluetooth,
WiFi, FM and NFC.
• Designed for speed, compatibility and power savings:
Snapdragon S4 Processor MSM8960 chipset includes the industry’s only complete platform that integrates all of the world’s leading 2G, 3G and 4G mobile broadband modem technologies on a single chip. This new integrated multimode modem is based on an advanced, programmable architecture that is performance, size and power optimized for the fastest combination of modems available for:
- LTE FDD/TDD (Cat3)
- 3G (DC-HSPA+ Cat 24)
- EV-DO Rev. B
- 1x Advanced
- TD-SCDMA
- GSM/GPRS/EDGE NFC.
Multimode/Multiband Means Worldwide Coverage.
• Support for multiple radio frequencies: Mobile broadband technologies are growing increasingly complex in their implementation. LTE is currently being implemented in over 40 diff erent radio frequency bands throughout the world. To complement its wide range of modem standards supported, Qualcomm has designed the Snapdragon S4 Processor MSM8960 CHIPSET platform to <<< address all commonly-used frequencies (from 700–2600 MHz) and bandwidths up to 20 MHz>>>, allowing its customers to address any mobile network opportunity whether the simplest single frequency implementation to the most extensive multi-frequency global mode, whether 4G, 3G or 2G.
-----------------------------------------------------------
Based on the document the chip can handle all LTE Standards, but it depends on his "advanced, programmable architecture"....as written there and how Motorola / Sprint implemented this, maybe they reduced LTE only to one Standard.
I don't have LTE in my area and so I cannot test this.
That's possibly right.
Something else:
If I remember correctly, somewhere in this forum have been said that for CDMA the internal Sprint "ID"(?) is used.
Maybe that's also the reason why I cannot connect to LTE in my area.
The phone is trying to "login" with the Sprint ID and this of course won't work.
The ##DEBUG# menu wasn't helpfull. It shows frequencies for american standards and not for GSM/WCDMA.
Also the LTE menu is also not very helpfull, it doesn't show frequencies at all.
Any News on this topic?
Maybe one of the developers can give a statement?
Yesterday I tested a LTE compatible SIM card.
My Bro has a Samsung Galaxy S4 with 4G/LTE in my area.
So I've put his SIM-Card into my Photon Q and set LTE only.
I had no luck, the Phone couldn't register into the network for this SIM.
I guess either it has the wrong frequencies or LTE is for inbuilt "SIM" (Sprint SIM?) only.
The latter. LTE is configured only for 1900 MHz which Sprint uses.
LTE is configured only for Sprint's frequencies, however, it supports the United States frequencies of PCS blocks A-G. The G Block is Sprint's current LTE channel, and they may deploy it later on Blocks A through F, depending on if they own the spectrum in a given market. The reason you see EU networks when the phone is in LTE Only Mode is most likely because the Phone still sees GSM signals, but will only connect to LTE ones from those GSM signals. Likewise, in the US, if you force LTE Only and then search for networks, AT&T and T-Mobile US will come up as the GSM carriers the Photon Q sees, rather than the LTE signals it sees.
Setting the Photon to LTE Only will not do anything for LTE in the EU. I suspect that if another carrier in the EU uses the 1900 MHz for LTE, the Photon Q will have no issues connecting to LTE in Europe. But until that time, be happy with HSPA.
Skrilax_CZ said:
LTE is configured only for 1900 MHz which Sprint uses.
Click to expand...
Click to collapse
Can this configuration theoretically be changed / other frequencies be added?
Only if you break BP security.
Skrilax_CZ said:
Only if you break BP security.
Click to expand...
Click to collapse
Sorry, what's that?
IIRC The only place with 850mhz LTE available is the Chicago market and currently no phones at all support it. :crying:
Not only does your phone need to support it, your PRL and cell-site does too...
Use to calculate Qualcomm NV items for adding GSM / WCDMA / LTE bands.
Do you want to add any GSM / WCDMA / LTE bands to your phone? Then use this app to calculate all needed NV items.
This app is only useful for phone with a Qualcomm chipset.
If you don't know how to add GSM / WCDMA / LTE bands to your phone, please refer to this thread. That thread is for S5 model, but the same principle is also applicable for many other phones, e.g. Samsung, LG, Sony, HTC, Nexus...
You also need some NV editor software (e.g. QPST, QXDM, EFS Professional...) on the PC to write these NV items to your phone.
>> NV items description:
- Adding GSM / WCDMA bands:
NV 01877 - RF Band Configuration
NV 00441 - Band Class Preference
NV 00946 - Expand Band Preference 16 to 32 Bits
NV 02954 - Bits 32 to 63 of Band Preference
- Adding LTE bands:
NV 06828 - LTE BC Configuration
NV 06829 - LTE BC Configuration DIV
DOWNLOAD: https://play.google.com/store/apps/details?id=org.vndnguyen.nvcalc
reserved
This app can show the calculation result in 3 formats: Decimal, Hexadecimal and Byte-swapped Hex.
Update v1.0.5:
- Fix UI issue on some devices.
- Add separate notation settings for GSM/WCDMA and LTE calculation. You should not change the default settings unless you know what you are doing.
I'm intersted in Qualcomm NV access, but not for cell band issues. There appear to be GPS issues with some Samsung phones, and there is some indication that those issues are related to a NV "privacy flag". Apparently older ROMs can turn this bit on and off, but newer ROMs don't - whatever value was left there is "stranded" there. There are people flashing back to CM10.x, setting this bit, then flashing back to CM11. I'm presuming that what is really happening is that they're tweaking this on NV location.
If we could simply read the NV location, we could compare its value to GPS functionality, and see if this is really the issue.
If the above is true, and if we could simply write this one NV location, we'd have a heck of a lot simpler GPS fix.
Thanks, vndnguyen, for your app. And it would be very nice if you add CDMA bands to your app. Thanks again.
if i am interested in enabling umts bands in somewhat old msm7227a based motorola, running gb 2.3.7, with no custom recovery, no custom roms or anything, but rooted.
should i even try?
thanks for making this, i wonder if my Snapdragon 600 on LG G Pro E988 can use this to enable China's TD WCDMA and TD LTE, since FDD is kinda different than TDD
vndnguyen said:
Use to calculate Qualcomm NV items for adding GSM / WCDMA / LTE bands.
Do you want to add any GSM / WCDMA / LTE bands to your phone? Then use this app to calculate all needed NV items.
Click to expand...
Click to collapse
Got a question. I found a discrepancy in your calculator.... Your NV calculator values do not match the NV value of the LTE bands my phone already has. So, how can I trust the calculator to give me correct values for additional bands I wish to enable?
It's at the bottom of this post, but I am putting a lot of information about my phone first, so you know the whole situation.
I have 5.2" 1440p, 3GB RAM Moto Maxx (XT1225), which has Snapdragon 805 -- same as the (Motorola) Nexus 6. In fact it was being tested by Google to be the Nexus 6 (or a Nexus 6 variant) as late as mid-August -- but Google decided to go with the larger size variant and only the larger size variant.
Motorola re-purposed this phone as the Verizon Droid Turbo (XT1254) in the USA and as the Moto Maxx (XT1225) now being sold in a handful of Latin America countries. We already have root, TWRP recovery.
When this phone was being tested by the FCC, it had these LTE bands:
But now being sold as the Moto Maxx (SAME FCC ID number), Motorola enabled more GSM bands and changed one of the LTE bands.
They disabled LTE band 5 (a minor AT&T LTE band), and enabled LTE band 3 (which is used more in Latin America countries).
QPST confirms the 2G/3G bands Motorola now claims for this phone:
Which means the LTE bands they now claim (2, 3, 4, 7, 17) are also probably correct.
Again this phone has the SAME FCC ID NUMBER. And as it's being sold in Puerto Rico (U.S. territory), that is very important. That means there's been no hardware change since U.S. FCC certification -- only software change.
Motorola also promises it has the SAME HARDWARE (including antenna) that the Droid Turbo (XT1254) has (even though the Droid Turbo has a different FCC ID number):
This is also important. It means really, Motorola could not sell the Moto Maxx (XT1225) in Puerto Rico (U.S. territory) under that FCC ID number if any radio-specific hardware had been changed at all.
Thus, we know the additional GSM bands, change in the LTE bands by Motorola was software modem change.
With me so far?
___________________________
Now the discrepancy...
In QXDM NV browser, in Line 6828, the XT1225 phone showed a value of 65630 (for LTE bands 2, 3, 4, 7, 17).
Yet, according to your app, with THESE LTE BANDS enabled (2,3,4,7,17)...
it should be THIS value: 65614.
Now I admit that's CLOSE, but it's not the same.
Therefore, how do I trust the calculator to let me enable MORE bands if this default number does not match in your calculator?
I have edited the values of that line to theoretically enable more LTE bands, but if the beginning number from the phone does not match what your calculator number says, then what exactly have I enabled?
ChazzMatt said:
Now the discrepancy...
. . . . .
Now I admit that's CLOSE, but it's not the same.
Therefore, how do I trust the calculator to let me enable MORE bands if this default number does not match in your calculator?
I have edited the values of that line to theoretically enable more LTE bands, but if the beginning number from the phone does not match what your calculator number says, then what exactly have I enabled?
Click to expand...
Click to collapse
Thank you for your patience for a such long post
But the problem was too simple.
Code:
If supporting LTE Bands are [COLOR="Blue"]2, 4, 5, 7, 17[/COLOR]:
NV 6828 = [COLOR="Red"]65,626[/COLOR]
If supporting LTE Bands are [COLOR="Blue"]2, 3, 4, 7, 17[/COLOR]:
NV 6828 = [COLOR="Red"]65,614[/COLOR]
If supporting LTE Bands are [COLOR="Blue"]2, 3, 4, 5, 7, 17[/COLOR]:
NV 6828 = [COLOR="Red"]65,630[/COLOR]
I don't how how many bands does your phone support. But if the value of NV 6828 in the QXDM NV browser is 65,630, that phone should support the following bands: 2, 3, 4, 5, 7, 17.
There is NO discrepancy here.
vndnguyen said:
Thank you for your patience for a such long post
But the problem was too simple.
Code:
If supporting LTE Bands are [COLOR="Blue"]2, 4, 5, 7, 17[/COLOR]:
NV 6828 = [COLOR="Red"]65,626[/COLOR]
If supporting LTE Bands are [COLOR="Blue"]2, 3, 4, 7, 17[/COLOR]:
NV 6828 = [COLOR="Red"]65,614[/COLOR]
If supporting LTE Bands are [COLOR="Blue"]2, 3, 4, 5, 7, 17[/COLOR]:
NV 6828 = [COLOR="Red"]65,630[/COLOR]
I don't how how many bands does your phone support. But if the value of NV 6828 in the QXDM NV browser is 65,630, that phone should support the following bands: 2, 3, 4, 5, 7, 17.
There is NO discrepancy here.
Click to expand...
Click to collapse
So, you are saying the phone supports LTE band 5 out of the box, even though Moto only lists 2,3,4,7,17 on the retail specs?
That after FCC testing they only enabled additional LTE Band 3, but did not disable LTE band 5?
If so, that's interesting.
Only to get you correct: this mod is only to extend the range of usable LTE/GSM bands for roaming, not to extend your connectivity while using your default provider in your home country (e.g. to get better coverage in areas where your default provider has a low signal strenght), right?
orville87 said:
Only to get you correct: this mod is only to extend the range of usable LTE/GSM bands for roaming, not to extend your connectivity while using your default provider in your home country (e.g. to get better coverage in areas where your default provider has a low signal strenght), right?
Click to expand...
Click to collapse
Or when changing from one carrier to another in the same country. Many carriers lock down bands the phone could receive, because they want the phone to only be used on their network.
Okay so I'm not really understanding the whole idea behind this. I have a Sony Xperia Z(C6603) and my phone already supports the LTE bands(LTE_BC1, LTE_BC3, LTE_BC5, LTE_BC7, LTE_BC8, LTE_BC20). My problem is that by default my phone and service provider should be able to have LTE working since my service provider also supports LTE band 4 and 7 on their network but upon choosing LTE network modes it has no reception at all, only 3G and HSPA. So I'm assuming I need to do additional unlocking here on my end for my phone but am not really sure why.
I'm able to access through the hidden menu of *#*#4636#*#* and change radio bands and network modes:
But I haven't changed the radio band and tested it yet because I don't know what the outcome will be and if there are any risks or hard bricking of it and don't know how to revert back to default. My service provider's network supports LTE band 4(2100MHz) and band 7(2600MHz). Would I need to go through QXDM to have these 2 frequencies enabled on my phone? Because I noticed how from the radio band list of my phone shows Euro Band which ends up to be 2600MHz but I'm not sure if that's how to enable LTE because it's Euro radio band. Am I okay as it is with my phone's default radio band and just unlock band 4 and 7 somehow through QXDM? Sorry I'm just really clueless and don't want to risk hard bricking my one and only phone.
sweetandsoursauce said:
Okay so I'm not really understanding the whole idea behind this. I have a Sony Xperia Z(C6603) and my phone already supports the LTE bands(LTE_BC1, LTE_BC3, LTE_BC5, LTE_BC7, LTE_BC8, LTE_BC20). My problem is that by default my phone and service provider should be able to have LTE working since my service provider also supports LTE band 4 and 7 on their network but upon choosing LTE network modes it has no reception at all, only 3G and HSPA. So I'm assuming I need to do additional unlocking here on my end for my phone but am not really sure why.
I'm able to access through the hidden menu of *#*#4636#*#* and change radio bands and network modes:
But I haven't changed the radio band and tested it yet because I don't know what the outcome will be and if there are any risks or hard bricking of it and don't know how to revert back to default. My service provider's network supports LTE band 4(2100MHz) and band 7(2600MHz). Would I need to go through QXDM to have these 2 frequencies enabled on my phone? Because I noticed how from the radio band list of my phone shows Euro Band which ends up to be 2600MHz but I'm not sure if that's how to enable LTE because it's Euro radio band. Am I okay as it is with my phone's default radio band and just unlock band 4 and 7 somehow through QXDM? Sorry I'm just really clueless and don't want to risk hard bricking my one and only phone.
Click to expand...
Click to collapse
Your provider supports LTE bands 4 and 7. Of those two, your phone can receive LTE band 7, but you don't see it. Are you sure LTE band 7 is in your area?
My carrier supports five different LTE bands (and my phone can receive them all), but in my area I only see two of those LTE bands. The others are not used in this area by my carrier (AT&T).
ChazzMatt said:
Your provider supports 4 and 7. Your phone supports 7, but you don't see it. Are you sure 7 is in your area?
My carrier supports 5 LTE bands, but in my area I only see two. The others are not in this area.
Click to expand...
Click to collapse
Yeah my carrier supports band 4 and 7 in my area, the towers are everywhere.
I checked it using this website: http://www.ertyu.org/steven_nikkel/cancellsites.html
both 2100/2600 are within all the cellular towers in my area.
edit: so if I'm able to choose LTE network mode on my phone, does that mean the LTE network mode consists of all these frequencies of LTE_BC1, LTE_BC3, LTE_BC5, LTE_BC7, LTE_BC8, LTE_BC20? So everytime I change to LTE only or LTE/GSM etc etc, automatically my phone has 2100MHz and 2600MHz included? Which means I don't need QXDM to unlock anything further? It might just be a sim card defect or something maybe. Sorry I'm just trying to understand more
Hi
I am trying to use a US note 3 (n900a) on Europe, but I frequently lose connectivity (although bars are full). The only solution I found is to fix wcdma to 2100 freq, however this also means that I lose reception when there is only GSM coverage.
This app seems to be the ultimate solution for me to calculate a custom NV for GSM+wcdma2100. Am I right?
If so, may I use a NV writer without a box, by just using my usb cable?
Thanks a lot
Sent from my SM-N910F using Tapatalk
Update v1.0.6:
- Fix UI issue on some devices.
- Remove the word 'Qualcomm' in the app's title to avoid violation of the Content Policy.
mate do you have or create any nv calculator for frequency bands? Thanks!
Click to expand...
Click to collapse
@tatozan
Hi, in this app you can also find frequency bands
Regards.
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 ?