Problems with Celular Data after update to 7.1.1

Shmuel · Post time 2017-6-5 00:24:17

I downgrade one of our UMI Z to Android 6 (20170412_g15v97_kw_u8_4m) and the problem of very slow communication in 3G and 4G continues. I put the sim in my old smartphone and the celular data there is very fast.
I dont know what to do.

nctran · Post time 2017-6-5 02:23:06

I have reported this error since yesterday as well. I'm in France and using the SFR network. Today, I have noticed that the mobile data stops working after using Google Maps navigation for a while as well.

Medard22 · Post time 2017-6-5 03:21:18

You did the OTA update or SPFT one? Could you check if your IMEI numbers are intact? SPFT update from Marshmallow to Nougat locks the nvram partition which leads to lost IMEI numbers. I didn´t notice any problems with the mobile data in 7.1.1

Gerald · Post time 2017-6-5 04:49:08

nctran replied at 2017-6-5 02:23
I have reported this error since yesterday as well. I'm in France and using the SFR network. Today, ...

Hi
I m the same issue and I am in France and using sfr network also...I think there is a issue with the compatibily between umi z 7.1.1 upgeade and sfr network...why...I don t know...very strange

UFO · Post time 2017-6-5 05:01:36

Hi i also have a problem with the mobile network. Please could you try to deactivate Wlan and check if your phone switches to mobile network. Check with browser to open for example Google or something. Here in Germany with tonline mobile 4g it switches mobile network on only after reboot. No other chance to get mobile network back to work. Big bug. Please check this.

Gerald · Post time 2017-6-5 05:03:46

Edited by Gerald at 2017-6-5 05:07 \n\nHi
same issue even if reboot, it works 5 min.and mobile 4g network fall after.
big bug !

Shmuel · Post time 2017-6-5 08:48:09

Medard22 replied at 2017-6-5 03:21
You did the OTA update or SPFT one? Could you check if your IMEI numbers are intact? SPFT update fro ...

Thank you for your help!!!

In the beginning I Installed TWRP and make root On both phones.
But because I can't make online update, I use SPFT and installed fresh 20170412_g15v97_kw_u8_4m Rom.

I check my IMEI numbers and this is the resolts:
Phone No 1:
356929080113970
356929080113988

Phone No 2:
   356929080071871
   356929080071889

I check the all 4 numbers with 'imei numbers check' and it's looks fine: but the Brand of al 4 Number are-ROOTJOY
Information about your phone

Model: Z

Brand: ROOTJOY

IMEI: TAC: 356929 FAC: 08 SNR: 007187 CD: 1

Basic information: Device type:
Phone

SIM card size:
Mini Sim - Regular

Display:

Touch screen:

Built-in memory:

            OS:

Do you have any advice whatsoever?

Shmuel · Post time 2017-6-5 14:54:48

Very Good news
Manually changing of APN settings solved the problem !!!

Gerald · Post time 2017-6-5 14:56:33

Edited by Gerald at 2017-6-5 14:59 \n\n
from my side, I did:
all in normal way
OTA updade
both IMEI are there, seems good.Brand is good.

thanks

Gerald · Post time 2017-6-5 15:02:32

Shmuel replied at 2017-6-5 14:54
Very Good news
Manually changing of APN settings solved the problem !!!

Hi
could you give us what setup did you modify ?(even if we are not in the same country, it could be help aswell)
many thanks