So I have a Verizon Galaxy S7 and I joined the AT&T network. Most (not all) of incoming calls come in with a prefix of +. So instead of 724-288-1234 it is +724-288-1234. This is inconvenient because I cannot call the number back through recent calls. I tried the assisted call settings, I had tried everything with that and even went to AT&T store to figure it out. The only thing I have found with my research is an app called 'prefixer' which is no longer available on google play store. My phone is not rooted. I feel I need to add, my phone works perfectly fine other than this and I cannot afford a new phone at this time. REV0.6 | SM-G930V | v 8.0.0