I have also been battling this phone since I got it. I have Xfinity. I had a problem where I couldn't receive texts. Restarting the phone fixed it. Then I realized when I went to answer phone calls when in wifi, it would end the call. Or if I tried to make a call it was start calling and within a second end the call. Trouble shooting identified that with wifi calling on and in wifi, it would not work. If I went outisde where I don't have wifi anymore it would work. Come back inside to wifi, it won't work. then I turned off wifi calling and it worked with cell service. Then I tried airplane mode with wifi on and it worked.
Restarting the phone seems to fix it for a while. It took about 2.5 weeks for it to start failing again after I restarted. Xfinity says it is not their problem even though they sold me the phone. Took phone to samsung support because in warranty and they said it worked perfectly. (I had restarted it as part of trouble shooting the day before so of course it worked). They said there was no log in the phone showing any malfunctions.
My motorola never had an issue with this EVER! When i can financially manage it, I am going back to Motorola. Have to wait 2 more months before I am eligible for early upgrade and trade in. If anyone figures out a fix, would love to know about it. I did just switch to wifi preferred but I saw someone else did that and it didn't fix the problem. For me it seems like the only solution is to get on a schedule of restarting my phone every week. Hope that doesn't damage the phone but maybe i don't care at this point.
