a) what about a pc connected by cable? does the problem persists?
b) also the moment you loose connection do you see the network led flahsing?
c) using a pc and within the network settings find the ip address of yoru slingbox and then you open a command prompt window and you trype> ping -t xx.xxx.xxx.xxx where xxx is the ip of your slingbox,
if you always get reply's while you loose connection on your phone > then its your wifi settings - try to change the wifi broacast channel of your router ( channels to test 6, 9 and 11 )
I'm not at home right now. But my slingbox 350 is connected with an ethernet cable - > switch - > router.
I bought an M2 on Monday. I'll see if that's any more reliable than my 350 over LTE and wifi when away from home.
I might need to replace my router as well. Although i haven't had any problems with my home computer and being able to access the Internet or do downloads. So I think my problem is that my 350 is starting to die on me.