My Firephone Hangs then Reboots Often when using Mobile Network

Hi guys, I just recently bought a new FirePhone now on CM11 however what I noticed is that it keeps on rebooting like almost every time an application uses the internet connected to mobile network.

Has anyone experienced similar case as this? I tried not to use mobile internet and instead used Wifi and internet connection worked fine and there were no reboots.

I am using CM11 release of 09/15/2015. I followed well the steps on installation. Performed clean install and even installed GApps pico but still same outcome.

I hope someone can share what was done to prevent the sudden reboots when accessing mobile internet.

Can't see Firephone in windows

I set USB connection as File transfer, previously I was able to see it in my windows computer under portable devices, but after I disabled some system apps of Firephone, also disabled most permission of running apps and disabled auto startup options of the apps, I can't see Firephone in windows now, though adb debugging still works.
Any ideas? Thanks.

Got a free replacement firephone on amazon UK

So I've had a smahed fire phone laying around for the last few months and decided to to contact amazon customer support to see how I could go around getting it repaired / replaced. Well I dropped it and smashed the front glass on the digitizer so chances of being repaced under warranty were slim at best. But hey, low and behold the customer representative just replaced it free anyhow. So yeah it's not the best phone in the world but a fully working bad phone is better than a smashed bad phone. So if you guys got any water damaged or smashed fire phones laying about if give it a go.