640xl network issue on Windows 10 :/

[systematicchaos]

I bought 640xl a week ago. Installed the W10 preview and almost everything worked fine.
After a couple days, there was a problem. When I call anyone the phone app hangs. I press "End Call" button but nothing happens, the call doesn't end. A restart makes it work again perfectly. but then it happens again whenever the phone is idle for an hour or so, have to restart 3-4 times a day. And now people are complaining that my phone is always 'not responding' when they call me. Can anyone tell what's the fix? I went back to 8.1 and the problem was there as well. Can anyone please help me out?

 

[anon(8195883)]

That sounds like a hardware issue, I've never had that happen before with mine. What model? mine is RM-1096

 

[systematicchaos]

Mine is RM-1067.