When I'm on cellular network i often have full reception on 4g, when suddenly it drops to absolute zero all of the sudden, data is disconnected and no phone calls can be made during that time. If i wait 10-15sec it is connecting again and up to full strength.
This happens all the time with a few minutes between each time, and has no affect of the location I'm at.
Often I'm just surfing the web when it comes up that this requires internet connection, and notices the bars are gone, and have to wait a few seconds before its back online again.
What would be the best steps to troubleshoot this? Is there any radio log on the phone that i can tail for errors?
Can it be hardware error? Can it be that the simcard looses connection to the hardware?
Im currently running a custom rom, but it was the same with stock when i tried that.
Any help appreciated!