After more than 15 years covering everything Apple, it’s with a heavy heart we announce that we will no longer be publishing new content on iMore and the iMore forums will be closing as of November 1st, 2024.
312 770 is a Verizon Wireless roaming zone. 310 830 is a Sprint roaming zone. They are Mobile Network Codes (MNC). No clue why they show there that way.