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I have a problem with the 4G on this phone...
4G connects and works OK,but when the phone moves about, like when on a car journey, it doesn't hop between 4G bands or drop back to 3G when the signal changes. It doesn't seem to hunt for a better signal, which means the data just drops out and stops working.
Problem is you don't notice it's happened until you pick up the phone and try to do something or notice it's been quiet for too long.
If I force 3G by going: "Settings -> Network & Internet -> Mobile Network -> Advanced -> Preferred Network Type -> 3G" it's happy to use 3G data all day long, but setting it back to 4G exhibits the problem.
It's a European UmidigiX on firmware (EU)V1.0_20191024.V3.03 flashed to the phone using the flash tool and everything wiped to factory settings after the flash. I'm on the Giffgaff network (which uses O2 infrastructure) and have manually entered an APN for Giffgaff as it's not natively on the phone.
I'm going to experiment with the Engineer mode and set bandmode 4G bands 1,3,20 and 40 only on SIM1 (lots more are selected by default) as they're the ones used by Giffgaff (on O2) and see if that helps.
Thanks. |
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