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LTE band 7 (2600) not working. Same problem on V7.01_20170607 as before. I posted this issue many times and still no response from Umi.
I recently received my new Umi Super and updated to the last firmware V7.01_20170413, everything worked fine except for the 4G. I live in an area where band 7 (2600) is available but the phone can't connect to it. Of course, my preferred network type is set to 4G/3G/2G (auto).
I read a lot about the issue on the internet but I can't find a solution.
I checked the BandMode on the phone by dialing *#*#3646633#*#*, band 7 is included and checked. However, when I tried to remove the other LTE bands and keep only band 7, I got a message explaining that the list can't be empty ("Failed. The band is changed from not null to null, it is illegal"), though the list was not completely empty because band 7 was still selected.
Also, I tried to change the radio band by dialing *#*#4636#*#*, but process com.android.phone stopped working when I pressed "select radio band", even after I cleared cache in phone and sim apps.
I tried to factory reset and to switch between 3G and 4G settings, but nothing works.
Can anyone tell me how to fix the problem to get connected to 4G.
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