Get 850MHz 3G working on Samsung S5 Active I have Samsung S5 Active. It seems that it never get the 3G signal, only 2G.

After some research I found that 850Mhz is disabled in my phone, I tried to enabled it with the code: *#197328640# but no luck. This code seems to work only with S5 but not with S5 Active. I don't have even DEBUG SCREEN menu if I enter this code.

Any suggestion how can I enable 850 3G in my phone?

I also tried to connect to my phone from terminal:

$ adb shell
shell@android:/ $ am start -n com.android.settings/.BandMode


After entering these commands, I got to the menu in my phone:

Set GSM/UMTS Band:


but there were no options to chose. I believe somehting is blocking me from changing the band.

Please help, I can't use 3G until I fix it, it seems that mine other chinese phone works much better than Samsung S5 Active.
If the underlying baseband does not support 850 mhz it's not going to work.
Also, if you have a very old SIM it probably isn't going to work.

I believe the software can also prevent you to change the preference.

Maybe upgrade your baseband (radio) after rooting your phone. Maybe a factory upgrade will also do the trick, but I'm not sure. See http://forum.xda-developers.com/showthread.php?t=2794087 to root and be able to flash roms.

Personally, I'd try for a refund or return, try to let the store fix this issue. 3G is on the carton after all?