All callers, contacts or no, come up "Unknown" when calling, every time. Texts work as normal. All contacts have seven digit phone number entries. Re-starts and re-boots have no effect, nor does reprograming the phone with *228. This is a relatively new problem, here's the story: We were traveling across several states when for no apparent reason, I could no longer receive calls from anyone but still received voice mail notifications and texts. After a few days of this I called Verizon and they worked with me for about an hour on the phone, 45 minutes of which was with a tech. He stated he nor the tech next to him had ever heard of this problem. We tried several things but he was unable to diagnose the problem. However, after the second time he deleted my phone out of the system and "re-set" it, I started receiving calls, though they all be from "Unknown." Anyone ever heard of this before? I only found one other poster who complained of a similar problem, but he didn't provide enough info for me to understand if he was having my problem or not. I suppose I should, and probably will, call Verizon and see if it's an easy fix or not, but before I did I thought I would run it past the board.