[Q] 3G stopped working after android lollipop update - Moto G Q&A, Help & Troubleshooting

Hi all, How are you?
I have a Moto G (XT1034) with Android 5.1 (LPBS23.13-58-2) stock - no root.
Unfortunately, after lollipop update, the device only connects in 2G network mode.
I Have tried the following:
1)I have setup in setting 3G as preferred network:
Setting > More > Mobile Networks > Preferred network type > 3G
2)I have also rebooted in recovery, and I didi a factory reset;
3) I have called my network provider, and setup manually APN settings;
None of the above worked.
I have also tried to enter into Testing setup using the code *#*#4636#*#* on phone dallier, but that code does not work.
Please, May someone help me how to fix 3G connectivity?
I appreciate any help you can give me,
Roger

Please, May someone have any idea what could be this issue root cause?

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