I just unlocked an ATT iphone 5c so that I can use my verizon sim card on it but, when I stuck in the sim card it showed "Verizon" in the top corner for a little while then said "No Service". After turning on an off Celluar Data I eventually saw it say "Verizon LTE" in the corner but none of the signal circles were full, sometimes there would be one full one. I am able to text and receive messages and have internet access, however I cant make or receive calls. I have been without my phone going on 3 months and now that I finally got a phone and was able to unlock it, then run into this problem...it was very frustrating. Can anyone help me with this? I have attached a picture of what I have been experiencing.