1650-03 issues with 4G (B5, possibly B20 too) after 7.1.1 update

[ph03n!x]

Folks, wanted to leave you guys a heads up that some of us are facing issues with the phone not picking up a 4G signal, or picking a signal but not connecting to mobile data or VoLTE after the update to NPL26.118-20

Here's a thread I created specific to India and Jio 4G with Band 5 (850Hz) in the official Lenovo support forum - https://forums.lenovo.com/t5/forums.../Moto_Z/highlight/false/page/1/thread-id/2624

Here's one more thread - https://forums.lenovo.com/t5/forums/v3_1/forumtopicpage/board-id/Moto_Z/thread-id/2668/page/1

Before you upgrade, use LTE Discovery app to ensure you're not in one of these regions with an affected LTE Band!

 

[ph03n!x]

Update to the issue - my phone (running 7.1.1) is only trying to connect to Band 5 FDD-LTE in the location where I am at, but does not manage a LTE/ VoLTE signal or connects but drops/ does not connect after reboot. I used another XT1650-03 that is still running 7.0, which connects to Band 40 TDD-LTE (same exact location, same SIM used in both the devices). My service provider is known to utilize multiple LTE bands in the same location, but it is weird that 7.0 connects to Band 40 and works fine but 7.1.1 tries to connect only to Band 5 - that too without success.

I am roaming in a location where both Band 5 and Band 40 are available. 1650-03 with 7.0 connects to Band 40, but 7.1.1 insists on connecting to Band 5 but fails.

 

[gason74]

I have the same problem in austria.

 

[ph03n!x]

I have the same problem in austria.

Please post it in detail i n the Lenovo forum link from the first post of this thread. Let's make as much reports as we can there - we haven't seen any solution yet

 

[41LY45]

RETUS Unit here

Only Band 3 works.

Everything else drops out.

(Been trying to downgrade to RETUS 7.0 ever since)

 

[ph03n!x]

RETUS Unit here

Only Band 3 works.

Everything else drops out.

(Been trying to downgrade to RETUS 7.0 ever since)

There is no way to downgrade except for going in for replacement, and hope that the replacement device comes with 6.0.1 or 7.0, and not 7.1.1 - I tried this route with the Moto service already, and am thinking of going in for the replacement..

 

[sheratan_b]

There is no way to downgrade except for going in for replacement, and hope that the replacement device comes with 6.0.1 or 7.0, and not 7.1.1 - I tried this route with the Moto service already, and am thinking of going in for the replacement..

There are factory images available (for RETEU only 6.0.1 version is available), if i understand you correctly, downgrading by flashing the full ROM with mfastboot would not work properly...? I'm considering to just downgrade and wait for them to solve the issues with 7.1.1, since sending the device for repairs would be a hassle...

 

[ph03n!x]

There are factory images available (for RETEU only 6.0.1 version is available), if i understand you correctly, downgrading by flashing the full ROM with mfastboot would not work properly...? I'm considering to just downgrade and wait for them to solve the issues with 7.1.1, since sending the device for repairs would be a hassle...

It won't flash the boot, recovery, and system partitions (among others), and will tell you that you cannot downgrade.

I took mine to the service centre, and all they can do is reflash 7.1.1 - they cannot downgrade either, only option is replacement and hope the replaced device comes with 6.0.1 or 7.0

 

[sheratan_b]

It won't flash the boot, recovery, and system partitions (among others), and will tell you that you cannot downgrade.

I took mine to the service centre, and all they can do is reflash 7.1.1 - they cannot downgrade either, only option is replacement and hope the replaced device comes with 6.0.1 or 7.0

Have you tried flashing 7.0 on it? bullfinch110 suggested that the bootloader changed from 6.x to 7.x, that's why you can't downgrade, but flashing 7.0 should be fine. [link]
For you i suppose instead of the RETBR, you'd need some RETIN firmware.

 

[ph03n!x]

Have you tried flashing 7.0 on it? bullfinch110 suggested that the bootloader changed from 6.x to 7.x, that's why you can't downgrade, but flashing 7.0 should be fine. [link]
For you i suppose instead of the RETBR, you'd need some RETIN firmware.

I did not find the retin such image, think I tried the reteu 7.0, but it failed. Let me know if you're able to get it to downgrade - but have at least the 7.1.1 ota handy just in case. What I've found is that the modem will downgrade - and will probably fix the 4G issue, but WiFi won't work.

 

[41LY45]

There is no way to downgrade except for going in for replacement, and hope that the replacement device comes with 6.0.1 or 7.0, and not 7.1.1 - I tried this route with the Moto service already, and am thinking of going in for the replacement..

I unlocked the bootloader + used RSDLite to flash the retus 7.0.

Warranties be damned if it's gonna have to be ship it across the world.

 

[ph03n!x]

I unlocked the bootloader + used RSDLite to flash the retus 7.0.

Warranties be damned if it's gonna have to be ship it across the world.

That's great.. now I need to find retin 7.0, couldn't find it anywhere

 

[41LY45]

That's great.. now I need to find retin 7.0, couldn't find it anywhere

I believe it shares software update line with REAPAC

At least according to this side:https://firmware.center/firmware/Motorola/Moto%20Z/Stock/XT1650-03/

 

[mirrormurr]

Android 7.0 also missing LTE bands

Got my hands on an European Moto Z model xt1650-03 reteu, still on Android 7.0 with security patch of April 1st 2017, and am having LTE-reception limited to Band 1, 3 and 20, although provider and coverage indicate that band 5 and 8 also should be present.
In settings there is only 4g present, no enchanced 4g for LTE or Volte, although having activated those services through my provider (Vodafone CZ). The occasional 4+ is sometimes also showing.
Having read about the problems with the total loss of LTE for several users after upgrading to 7.1.1, I am very reluctant to make the jump before an eventual patch.
Any thoughts from other users with similar issues?

best regards,
mirrormurr, CZ

(posted this also in the lenovo-forum)

 

[ph03n!x]

After being thrown back and forth between phone support and service center, I have figured out the solution on my own. Long story short, use Baseband (NON-HLOS.bin) version M8996_1258.42.03.11R SID for retin considering it fixes the Jio 4G roaming issue. M8996_1258.42.03.11R is from retcn (XT1650-05)

As of build NPL26.118-20-5-3 (Oct 2017 Security patch), my phone has a Baseband version of M8996_1239.53.01.0126.04.01R SID, which does not work with Jio 4G if it is roaming between different parts of the country that uses different LTE Bands.

M8996_1258.42.03.11R SID works just fine - Jio 4G VoLTE works in roaming, Wifi and BT works too. When I need to update (security updates or to check if Moto finally fixed the problem), I flash the full firmware for NPL26.118-20-5, get OTA updates that came after, check if they fixed the issue (which they haven't till now) and flash M8996_1258.42.03.11R SID NON-HLOS.bin so that I can use my phone.

I also have my wife's phone with a SIM from the same Jio 4G network (in roaming too) that I have kept at 7.0 without upgrading to 7.1.1, only to prove to Moto service that the phone itself is fine, and its the update to 7.1.1 that messed it up. Her phone running 7.0 has Baseband version M8996_1239.53.01.126R SID and works fine in stock form. If I flash this Baseband version on my 7.1.1, 4G and VoLTE will work, but Wifi breaks.

Both the phones are bootloader-locked (never been unlocked), and not modded in any way. If you need any technical detail/ experiments, let me know - I am doing all that I can without unlocking my bootloader anyway.

 

[Benoe]

use Baseband (NON-HLOS.bin) version M8996_1258.42.03.11R SID for retin considering it fixes the Jio 4G roaming issue. M8996_1258.42.03.11R is from retcn (XT1650-05)

How did you flash the retcn baseband to your retin model?

 

[ph03n!x]

How did you flash the retcn baseband to your retin model?

fastboot flash modem NON-HLOS.bin

Flashing the modem does not require an unlocked bootloader, so you can experiment with different modems - just make sure you are flashing modem versions from the different variants of XT1650, that's all.

 

[41LY45]

September's 1+GB updated fixed most of the heating and LTE band issues.

You just have to fix the damage caused by the heating by replacing the batery.

 

[ph03n!x]

September's 1+GB updated fixed most of the heating and LTE band issues.

You just have to fix the damage caused by the heating by replacing the batery.

Unfortunately, the update did not fix the Jio 4G roaming issue I'd described in the OP. And this is the only fix apart from staying with 7.0 that helps...

 

[ph03n!x]

Finally, after almost 9 months of dealing with this problem, the retin update to OPL27.76-51 resolved the issue. The phone now readily latches on to Jio 4G when on roaming without me having to go through all the hassles I have been undergoing since I updated to 7.1.1.