RELIANCE JIO 4G SIM ( INDIA ) Nexus 4 Issue.. - Nexus 4 Q&A, Help & Troubleshooting

Recently I bought a Reliance Jio Sim for my nexus 4. But When I plugged it in, It doesn't register on any network.
Anybody knows how to make it work..
I tried changing Cellphone network in Settings to LTE. (didnt work)
I also tried 2nd method which i saw in one of Unbox Therapy Video.
I.e. dialing *#*#4636#*#* from dialer app
then selecting Phone Information .
Inside that Set Preferred network type to LTE/GSM auto (PRL)
That to didnt work.
Anybody knows any work around.
Thanks in advance.
Nexus 4 - Android 6.0.1 - not rooted - bootloader unlocked -TWRP Recovery - custom Rom - build No MMB29O dev-keys Fake Nexus Rom Marshmellow

anirudh.88 said:
Recently I bought a Reliance Jio Sim for my nexus 4. But When I plugged it in, It doesn't register on any network.
Anybody knows how to make it work..
I tried changing Cellphone network in Settings to LTE. (didnt work)
I also tried 2nd method which i saw in one of Unbox Therapy Video.
I.e. dialing *#*#4636#*#* from dialer app
then selecting Phone Information .
Inside that Set Preferred network type to LTE/GSM auto (PRL)
That to didnt work.
Anybody knows any work around.
Thanks in advance.
Nexus 4 - Android 6.0.1 - not rooted - bootloader unlocked -TWRP Recovery - custom Rom - build No MMB29O dev-keys Fake Nexus Rom Marshmellow
Click to expand...
Click to collapse
Our Nexus 4 is an 3G device even if you switch it to LTE(4G) it wont register, because Jio and all those other 4G sim in India uses different Band than aboard carriers.

sidnoit22 said:
Our Nexus 4 is an 3G device even if you switch it to LTE(4G) it wont register, because Jio and all those other 4G sim in India uses different Band than aboard carriers.
Click to expand...
Click to collapse
Which band does 4G network in US work on ..?
Taken from Quora:
Reliance holds the license for 2300 MHz spectrum all over the country plus, 800 MHz spectrum in 10 circles and 1800 MHz spectrum in 6 circles for all kinds of services. 1800 MHz band is one of the most popular bands for deploying LTE services across the world, due to considerable advantages over 2300 MHz band. Around 44% of global 4G networks are deployed over 1800 MHz spectrum.

anirudh.88 said:
Recently I bought a Reliance Jio Sim for my nexus 4. But When I plugged it in, It doesn't register on any network.
Anybody knows how to make it work..
I tried changing Cellphone network in Settings to LTE. (didnt work)
I also tried 2nd method which i saw in one of Unbox Therapy Video.
I.e. dialing *#*#4636#*#* from dialer app
then selecting Phone Information .
Inside that Set Preferred network type to LTE/GSM auto (PRL)
That to didnt work.
Anybody knows any work around.
Thanks in advance.
Nexus 4 - Android 6.0.1 - not rooted - bootloader unlocked -TWRP Recovery - custom Rom - build No MMB29O dev-keys Fake Nexus Rom Marshmellow
Click to expand...
Click to collapse
You'll have to flash hybrid modem. Check this post: http://www.xda-developers.com/google-nexus-4-lollipop-lte/
Nitin

anirudh.88 said:
Which band does 4G network in US work on ..?
Taken from Quora:
Reliance holds the license for 2300 MHz spectrum all over the country plus, 800 MHz spectrum in 10 circles and 1800 MHz spectrum in 6 circles for all kinds of services. 1800 MHz band is one of the most popular bands for deploying LTE services across the world, due to considerable advantages over 2300 MHz band. Around 44% of global 4G networks are deployed over 1800 MHz spectrum.
Click to expand...
Click to collapse
The chip supports only 1700/2100mhz

anirudh.88 said:
Recently I bought a Reliance Jio Sim for my nexus 4. But When I plugged it in, It doesn't register on any network.
Anybody knows how to make it work..
I tried changing Cellphone network in Settings to LTE. (didnt work)
I also tried 2nd method which i saw in one of Unbox Therapy Video.
I.e. dialing *#*#4636#*#* from dialer app
then selecting Phone Information .
Inside that Set Preferred network type to LTE/GSM auto (PRL)
That to didnt work.
Anybody knows any work around.
Thanks in advance.
Nexus 4 - Android 6.0.1 - not rooted - bootloader unlocked -TWRP Recovery - custom Rom - build No MMB29O dev-keys Fake Nexus Rom Marshmellow
Click to expand...
Click to collapse
It wont work bro i tried all

I am quite interested in this thread. Even I was thinking of getting a 4G sim. I will follow this post.

nitin.chobhe said:
You'll have to flash hybrid modem. Check this post: http://www.xda-developers.com/google-nexus-4-lollipop-lte/
Nitin
Click to expand...
Click to collapse
No need i already have latest Android Nougat Rom which shows 2G , 3G , LTE in cellular networks ..
This method was for old Android versions .. lollipop JB devices...
4G wont work ..
Thinking of getting a new 4g phone .. might go for ONE PLUS 3 ..
Amazon sale is ON..

swapnil0545 said:
I am quite interested in this thread. Even I was thinking of getting a 4G sim. I will follow this post.
Click to expand...
Click to collapse
Swapnil .. 4G wont work in our device.. Only 1-2 bands are supported on our nexus 4 ..
New 4G band auction is going to happen very soon .. Maybe then we can get 4G from some carrier..
But its not worth it .. As i have read somewhere the antennae is there in phone but not the amplifier... So you'll get very weak signals all the time and it'll drain your battery very fast..

anirudh.88 said:
No need i already have latest Android Nougat Rom which shows 2G , 3G , LTE in cellular networks ..
This method was for old Android versions .. lollipop JB devices...
4G wont work ..
Thinking of getting a new 4g phone .. might go for ONE PLUS 3 ..
Amazon sale is ON..
Click to expand...
Click to collapse
Even though you have Nougat on your phone, the modem is still the old one (because you might be knowing that Google doesn't support this phone since last 2 years i.e. after lollipop).
And as I mentioned earlier in my post, JIO can be used on Nexus 4, see this post on facebook.
What Nougat ROM do you have BTW?
Nitin

Is LTE really working on Nexus 4 in India? If so, on what carriers? If someone would be kind enough to confirm. Its just that, other than one person everyone is saying no. Really like my Nexus 4, don't want to buy a new phone
PS: Haven't bought a 4G sim yet, just waiting for confirmation.

I came to know that it only works in LTE band 4; and this band is not used in India. So LTW WILL NOT WORK in India. Don't know why that guy posted that on facebook (to which I linked on last page)
Nitin

Nexus 4 doesnt support TD LTE even after flashing hybrid modem. heck it doesnt even support remianing LTE bands. so no go

This really sucks guys, considering we would have achieved free services till 31st dec

Lords3ye said:
This really sucks guys, considering we would have achieved free services till 31st dec
Click to expand...
Click to collapse
Shocked to read this. Expectations from a device released in late 2012. But i think you can try multiboot kitkat/jellybean for LTE hacks with mm/n till dec 31.

My N4 is on your build NitrogenOS 7.1.1 but Jio ? Have you tried jio on N4?
nitin.chobhe said:
Even though you have Nougat on your phone, the modem is still the old one (because you might be knowing that Google doesn't support this phone since last 2 years i.e. after lollipop).
And as I mentioned earlier in my post, JIO can be used on Nexus 4, see this post on facebook
What Nougat ROM do you have BTW?
Nitin
Click to expand...
Click to collapse
Have you personally tried Jio on N4?
I follow your NitrogenOS releases and was happy to see the LTE recommendation in the settings.But today I've tried jio sim on my N4, the device has shown the Jio 4G but with a warning, NO SERVICE should I have to tweak something in the phone information provided by *#*#4636#*#* ??

Pranavkmar said:
Have you personally tried Jio on N4?
I follow your NitrogenOS releases and was happy to see the LTE recommendation in the settings.But today I've tried jio sim on my N4, the device has shown the Jio 4G but with a warning, NO SERVICE should I have to tweak something in the phone information provided by *#*#4636#*#* ??
Click to expand...
Click to collapse
Unfortunately 4G/ LTE can not be used on Nexus 4 in India (I think the post on FB to which I linked was misleading)
No, I've not tried jio SIM on my phone
Nitin

nitin.chobhe said:
Unfortunately 4G/ LTE can not be used on Nexus 4 in India (I think the post on FB to which I linked was misleading)
No, I've not tried jio SIM on my phone
Nitin
Click to expand...
Click to collapse
Fine, we're only left with an option to upgrade our hardware ??? 4G on N4 is only possible when some network carriers get band 4 1700/2100 AWS

see this
Ok...so u cant use jio...its ok...take 4g 'IDEA' sim ...recharge I with 4g one month plan......then turn this sim on in any 4g mobile.....use some internet...then take it out out and put it in any 3g phone....u will be able to use free calling feature and 1gb daily internet on 3g speed.....

Related

Do you have LTE menu option on your One? (not EE customers)

I am on Three UK, and although LTE is not rolled out yet, I was surprised that the LTE menu options do not appear at all. For example, why wouldn't I have this option in case I roamed to a foreign country that provides LTE to roamers.
In the network options I only have
WCDMA only
GSM/WCDMA auto
I know those on EE have another option for LTE.
Supposedly LTE and 3G SIMs are the same. In fact Three will provide free LTE access later this year automatically and without any administrative changes.
Could others confirm, if they are not on an LTE network, whether they see the LTE option on the phones network settings?
I think the phone only shows the option to turn LTE on or off if it detects LTE on your network so it should appear automatically once Three launch LTE
I agree! I decompiled Settings.apk of the HTC One and the network selection option uses RadioInfo class to determine what should be shown on the menu. In fact I can even see CDMA & EV-DO there.
Excellent. Perfect answers. Thank you. For some reason I had it stuck in my head that it was based on the SIM provisioning. I should have realised that it is based on the capabilities of the network you are currently connected to rather than a provisioning option.
I have LTE option on mine, got it on vodafone contract from p4u though the phone is sim free/unlocked.
jonstatt said:
Excellent. Perfect answers. Thank you. For some reason I had it stuck in my head that it was based on the SIM provisioning. I should have realised that it is based on the capabilities of the network you are currently connected to rather than a provisioning option.
Click to expand...
Click to collapse
Hi buddy! As promised here's the post I was talking about on the other thread.
http://forum.xda-developers.com/showpost.php?p=39178384&postcount=674
Riyal said:
Hi buddy! As promised here's the post I was talking about on the other thread.
http://forum.xda-developers.com/showpost.php?p=39178384&postcount=674
Click to expand...
Click to collapse
Well done for finding that as it is buried in the P4U thread! Hopefully this thread will help others who wonder why they do, or do not, see LTE options in their menu!
AW: Do you have LTE menu option on your One? (not EE customers)
My Provider is o2 Germany and there is a LTE-Option.
Sent from my HTC One
2Nice4U said:
My Provider is o2 Germany and there is a LTE-Option.
Sent from my HTC One
Click to expand...
Click to collapse
Hi! Could you try remove the sim card and reboot your phone and see if the LTE option is still there?
r89HTC said:
I have LTE option on mine, got it on vodafone contract from p4u though the phone is sim free/unlocked.
Click to expand...
Click to collapse
Does this mean that it will work with AT&T LTE here in the US?
NextNexus said:
Does this mean that it will work with AT&T LTE here in the US?
Click to expand...
Click to collapse
No. LTE bands in the US are way different compared to the LTE bands all around the world. I'm not sure about LTE Cat 3 though.
AW: Do you have LTE menu option on your One? (not EE customers)
Can't select anything. Menu is gray...sounds logical to me without a SimCard
Sent from my HTC One
In reviews I keep seeing HSPA and LTE versions, which led me to believe there are models without the chip needed for 4G.
There is no answer on this though so I'm not going to rush to buy one until I know.
2Nice4U said:
Can't select anything. Menu is gray...sounds logical to me without a SimCard
Sent from my HTC One
Click to expand...
Click to collapse
Do you have any other sim(Must not have LTE on it's network) you could try inserting?
GSM / WCDMA / LTE auto
SIM-free from p4u using Vodafone Italy SIM, in an area not LTE covered
Oh crap Now that looks like a sign that it should have LTE option nomatter what sim you insert.
By the way could you tell me what's your baseband version?
Baseband version:
4A.13.3231.27_10.31.1131.05L
Riyal said:
Oh crap Now that looks like a sign that it should have LTE option nomatter what sim you insert.
By the way could you tell me what's your baseband version?
Click to expand...
Click to collapse
I tested a T-Mobile Sim.
The LTE Menu is also available here
It´s not depend on the SIM/Provider i think
I'm not showing lte version on my 3 Handset ? Which is worrying because I took out my new 3 contact for the 3 lte upgrade
Sent from my HTC One using xda premium
AW: Do you have LTE menu option on your One? (not EE customers)
Here the Software/Baseband Screenshot
Sent from my HTC One

Custom ROIM's Texting broken

So how come no matter what Custom ROM I try I can't text or get LTE support what so ever? Maybe I'm spoiled but it seems pointless to me
Krairo said:
So how come no matter what Custom ROM I try I can't text or get LTE support what so ever? Maybe I'm spoiled but it seems pointless to me
Click to expand...
Click to collapse
Maybe.
Seems like you just wanted to vent. You didn't say what custom ROMs you have tried or any other useful details, which leaves me no choice but to assume that you either haven't tried many ROMs or are wildly exaggerating.
Most of the ROMs that I have used work fine for both SMS and LTE. If you post a better description of your situation, what ROMs you have tried, specific errors you had, etc, then we'd have a much better basis to help you.
.
fffft said:
Maybe.
Seems like you just wanted to vent. You didn't say what custom ROMs you have tried or any other useful details, which leaves me no choice but to assume that you either haven't tried many ROMs or are wildy exaggerating.
Most of the ROMs that I have used work fine for both SMS and LTE. If you post a better description of your situation, what ROMs you have tried, specific errors you had, etc, then we'd have a much better basis to help you.
.
Click to expand...
Click to collapse
On the 900P G5
phoenix ROM v2.0 & SpeedROM v4 DEODEXED. No error except APN settings are non existant, same with seeing the LTE feature on the network type at all, & when sending a text it times out and says try again with no error except did not send try again.
Krairo said:
On the 900P G5
phoenix ROM v2.0 & SpeedROM v4 DEODEXED. No error except APN settings are non existant, same with seeing the LTE feature on the network type at all, & when sending a text it times out and says try again with no error except did not send try again.
Click to expand...
Click to collapse
Your original statement was rather dramatic:
Krairo said:
how come no matter what Custom ROM I try I can't text or get LTE support what so ever?
Click to expand...
Click to collapse
That implies that you have searched exhaustively without productive results. But you've only tried two ROMs. You are factually mistaken about the first ROM, and I'd wager about the second one too.
You said that there are no APN settings in Phoenix 2.0. I just reinstalled Phoenix and the APN settings are present in the expected place
Settings > Connections > More networks > Mobile networks > APN
SMS works fine as well.
For your LTE issues, you said that you are using a 900P model, but didn't say what carrier you use. You have a Sprint phone, so confirm that Sprint has LTE in your particular area and that your SIM /account is provisioned for LTE.
If you are using the handset on a different carrier then your LTE problems are due to using an incompatible phone, not ROM bugs. Sprint is a CDMA carrier, with limited LTE and even more limited compatibility with LTE on GSM carriers. This is not a ROM limitation, but caused because you have a CDMA version of the S5 that isn't configured for much more than the specific bands that Sprint uses.
Note that the specs for the 900P say that it can access LTE bands 25/26/41.
Now compare that to some GSM carriers
TMobile LTE bands 1/2/3/4/5/7/8/14/17
ATT LTE bands 1/2/3/4/5/7/17
Bell LTE bands 1/2/3/4/5/7/8/17
900F LTE bands 1/2/3/5/7/8/20
Or CDMA carriers
Verizon LTE bands 4/13
US Cellular LTE bands 2/4/5/12/17
You can see that most GSM carriers are largely compatible in the LTE bands that they use. The CDMA carriers in contrast have few bands in common with each other or GSM carriers.
In particular, your 900P doesn't appear to have any LTE bands in common with any of the other carriers. So the only way you will get LTE is if you are using Sprint in an area where Sprint has LTE service. Due to 900P restrictions, not the ROM.
.
Wrong LTE is available on sprint & in my area. And APN is non existent when using those ROMs. So its not my phone unless they don't support my phone
Good luck with your issues.
--------------------
None so deaf as those that will not hear. None so blind as those that will not see.
attrib. Heywood Dialogue of Proverbs, 1546
Krairo said:
So how come no matter what Custom ROM I try I can't text or get LTE support what so ever? Maybe I'm spoiled but it seems pointless to me
Click to expand...
Click to collapse
1. Did you used OLD SIM that you were using in your device before S5?
2. If yes than, Did that device had LTE?
3. If the the answer is Q 2 is NO, than simple solution, your SIM is not LTE activated. Just go to your service provider and tell them to change the SIM with LTE activated SIM... Hope it helps...
Chaitanyapatel8880 said:
1. Did you used OLD SIM that you were using in your device before S5?
2. If yes than, Did that device had LTE?
3. If the the answer is Q 2 is NO, than simple solution, your SIM is not LTE activated. Just go to your service provider and tell them to change the SIM with LTE activated SIM... Hope it helps...
Click to expand...
Click to collapse
Ok I had the iphone 5 on sprint. Yes it came with LTE & I honestly don't know if he used the same sim
does your phone works on stock rom?
Capt. Chaitanya Patel
If my post helped you than please click on THANKS button, it might be a little for you but VERY BIG for me... :angel:
My Contribution to XDA:
[GUIDE] [MAJOR UPDATE:5-JUL-14] Extreme Batterylife thread ADVANCE SETUP GUIDE

SM-N910K stuck on 3G in Brazil

Ok, so i ordered a SM-N910U from 28mobile.com, and they sent me a carrier branded SM-n910K, which by its specifications should work with Brazilian LTE (band 7 - 2600). However I am stuck on 3g. I was wondering if maybe the whole internet is wrong and this device doesnt support this band, or maybe its some sort of carrier lock. Also, how do i disable the awful branding, will flash a different firmware work and which do i flash?
Thanks
repl0id said:
Ok, so i ordered a SM-N910U from 28mobile.com, and they sent me a carrier branded SM-n910K, which by its specifications should work with Brazilian LTE (band 7 - 2600). However I am stuck on 3g. I was wondering if maybe the whole internet is wrong and this device doesnt support this band, or maybe its some sort of carrier lock. Also, how do i disable the awful branding, will flash a different firmware work and which do i flash?Thanks
Click to expand...
Click to collapse
1) check frequencies that U model supports @ samsung website (its asian/hong kong, right? those miss some frequencieos)
2) check which frequencies are used for 4g by your brazilian telco.
3) compare.
if frequencies match, you might want to try:
1) getting a new sim that is surely 4g-capable
2) getting an iphone nano-sim. this is crazy, but for many users in russian forums that has solved 4g connectivity issues with one telco.
3) making sure your plan supports 4g
4) ensure you have 4g coverage.
lisbon2004 said:
1) check frequencies that U model supports @ samsung website (its asian/hong kong, right? those miss some frequencieos)
2) check which frequencies are used for 4g by your brazilian telco.
3) compare.
if frequencies match, you might want to try:
1) getting a new sim that is surely 4g-capable
2) getting an iphone nano-sim. this is crazy, but for many users in russian forums that has solved 4g connectivity issues with one telco.
3) making sure your plan supports 4g
4) ensure you have 4g coverage.
Click to expand...
Click to collapse
1) Sim is 4g
2)will try
3) IT does
4) I do
Is the SM-N910U the same as the SM-N910K as far as LTE bands go? I dont get it, they are both supposed to support Band 7 - 2600MHZ, which is the one we have over here. What about flashing a different firmware? I've been trying with odin, to no success.
They do support that frequency so it's probably something to do with your sim card or carrier?
And 28mobile told me I was receiving one model only to get the k model like you. Wasn't happy. The updates for firmwares are slow
lawtq said:
They do support that frequency so it's probably something to do with your sim card or carrier?
And 28mobile told me I was receiving one model only to get the k model like you. Wasn't happy. The updates for firmwares are slow
Click to expand...
Click to collapse
Well, I am on a LTE plan, tried 3 different sims already, they are all stuck on 3G...And all our carriers have the same band, which is 7...So it's not the sim or the carrier...its the phone. I bet that there's some sort of lock going on, since all roaming options are grayed out (the phone is not stuck on roaming, however). I am trying to flash any other model's firmware, like U, C and even S, but odin always fails when trying.
repl0id said:
Ok, so i ordered a SM-N910U from 28mobile.com, and they sent me a carrier branded SM-n910K, which by its specifications should work with Brazilian LTE (band 7 - 2600). However I am stuck on 3g. I was wondering if maybe the whole internet is wrong and this device doesnt support this band, or maybe its some sort of carrier lock. Also, how do i disable the awful branding, will flash a different firmware work and which do i flash?
Thanks
Click to expand...
Click to collapse
When you ordered the "U"-model, and got a branded "K"-model, I would complain to the shop you bought it and demand a swap to the model you ordered!

ZE552KL not connecting to LTE band 17.

Various websites confirm its compatible with LTE band 17. My other phone connects to it while in my house, but the Zenfone will mostly connect to HSPA+, or sometimes LTE band 2. I cannot get it to stay connected to LTE unless I get into town or on the highway. (Actually as I'm typing, it switched to LTE band 2, but in awhile it will go back to HSPA)
If I root is there any way to unlock band 17? I'm in the US and my carrier runs off AT&T towers. I got this phone specifically because band 17 reaches far off places much better but I am unable to use it.
Edit: I just realized the model number in the Android settings is "asus_Z012DA" and that apparently is not a US variant. I didn't know about the different variants at all. Am I out of luck?
ryan770 said:
Various websites confirm its compatible with LTE band 17. My other phone connects to it while in my house, but the Zenfone will mostly connect to HSPA+, or sometimes LTE band 2. I cannot get it to stay connected to LTE unless I get into town or on the highway. (Actually as I'm typing, it switched to LTE band 2, but in awhile it will go back to HSPA)
If I root is there any way to unlock band 17? I'm in the US and my carrier runs off AT&T towers. I got this phone specifically because band 17 reaches far off places much better but I am unable to use it.
Edit: I just realized the model number in the Android settings is "asus_Z012DA" and that apparently is not a US variant. I didn't know about the different variants at all. Am I out of luck?
Click to expand...
Click to collapse
Hi!
Your correct model for band 17 should be Z012DC, the same used in Brazil.
ryan770 said:
Various websites confirm its compatible with LTE band 17. My other phone connects to it while in my house, but the Zenfone will mostly connect to HSPA+, or sometimes LTE band 2. I cannot get it to stay connected to LTE unless I get into town or on the highway. (Actually as I'm typing, it switched to LTE band 2, but in awhile it will go back to HSPA)
If I root is there any way to unlock band 17? I'm in the US and my carrier runs off AT&T towers. I got this phone specifically because band 17 reaches far off places much better but I am unable to use it.
Edit: I just realized the model number in the Android settings is "asus_Z012DA" and that apparently is not a US variant. I didn't know about the different variants at all. Am I out of luck?
Click to expand...
Click to collapse
For the time being yes you are. There is a way to unlock LTE bands on Qualcomm devices, but it seems ASUS has a fail safe built into kernel preventing it at the moment. If there is ever a custom rom developed for your phone then it maybe possible to unlock band 17. Until then no. I have been trying on my Zenfone 3 Ultra. Got as far as entering in the values for the bands I want and when I reboot it resets them to default. You can read up on it here:
https://forum.xda-developers.com/zenfone-3/help/help-putting-phone-usb-diag-mode-t3571627
Me and another user have been working on it. Maybe it might work for your phone. Always a chance.
roosevelt84 said:
Hi!
Your correct model for band 17 should be Z012DC, the same used in Brazil.
Click to expand...
Click to collapse
Yeah I realize that now. Even though I'm stuck with my phone, I still can't find the z012dc for sale anywhere. Practically no seller online lists which variant it is. In fact, after a few hours of research, I never even knew there was specifically variants.
doctahjeph said:
For the time being yes you are. There is a way to unlock LTE bands on Qualcomm devices, but it seems ASUS has a fail safe built into kernel preventing it at the moment. If there is ever a custom rom developed for your phone then it maybe possible to unlock band 17. Until then no. I have been trying on my Zenfone 3 Ultra. Got as far as entering in the values for the bands I want and when I reboot it resets them to default. You can read up on it here:
https://forum.xda-developers.com/zenfone-3/help/help-putting-phone-usb-diag-mode-t3571627
Me and another user have been working on it. Maybe it might work for your phone. Always a chance.
Click to expand...
Click to collapse
Whoa thanks man. I'll keep checking back and maybe I'll try it myself. Seems you guys are close.
I must say though, this isn't a complete deal breaker, though I am stuck with this phone anyway. The Hspa network is actually FASTER than LTE band 17 in my house. I'm just afraid if I travel somewhere and only band 17 is available I might run into some trouble. But then again, 3g or Hspa might still be able to connect.

T-Mobile Band 12

Can anyone verify this actually works? Got this phone with the intention of having better coverage from band 12, but i've never seen lte discovery show anything but band 4.
I'm on the stock rom w/ magisk, anyone have advice?
Hi,
Can you help me to understand the difference between th band 12 and band 4? I am green to this.
Thanks advance!
William Guo said:
Hi,
Can you help me to understand the difference between th band 12 and band 4? I am green to this.
Thanks advance!
Click to expand...
Click to collapse
In short, band 12 is a low frequency signal. The towers can broadcast huge coverage areas with the low frequency at the cost lower speed than their band 4 coverage areas. Band 12 for is great at penetrating buildings with thick walls.
Very few phones support this freq on T-mobile and I was hoping the mini could do it.
googletermsofservice said:
Can anyone verify this actually works? Got this phone with the intention of having better coverage from band 12, but i've never seen lte discovery show anything but band 4.
I'm on the stock rom w/ magisk, anyone have advice?
Click to expand...
Click to collapse
Are you testing it in the same place(s) you've had other phones show band 12 on LTE discovery? Officially it should work as of the Jan 2017 update. I'm pretty sure I have had it show band 12 when I was on stock (not rooted). I don't have a way to verify this now as my Mini is on LOS which currently does not support band 12 nor Wi-Fi calling. It's also my "secondary" phone until I get time to return it to stock (or LOS gets that functionality).
Sent from my Robin using XDA Labs
@googletermsofservice,
Thank you very much! Are there many service provider offer band 12 now? I mean, many providers such T-Mobile, ATT etc all offer band 12?
googletermsofservice said:
Can anyone verify this actually works? Got this phone with the intention of having better coverage from band 12, but i've never seen lte discovery show anything but band 4.
I'm on the stock rom w/ magisk, anyone have advice?
Click to expand...
Click to collapse
Does your phone stay on LTE when making a call (VOLTE)? If yes, the phone is working on band 12.
According to these website, the A7M should work with Band 12 and VOLTE & WFC:
https://www.androidpolice.com/2017/...ini-t-mobile-volte-december-security-patches/
http://www.spectrumgateway.com/compatible-phones
You need to make sure your phone is on at least the Dec update, if not newer.
Spectrum gateway is pretty reliable. I would use them as a first resource when considering a non-Tmo phone. I am supposed to receive this phone tomorrow. Will update if B12/VOLTE/WFC works...
I got the phone today. I can confirm that both VOLTE and WiFi calling work on TMobile after installing the update from the ZTE website here: https://www.zteusa.com/axon-7mini#support

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