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It is clean imei, already unlocked but Verizon is saying it wont work and its not working with a verizon sim. Help?

Hope this helps-Calvin Mogilinski Verizon has A1453 CDMA model, however all models of the iPhone 5s have LTE bands, and can work on AT&T’s 4G LTE network. The quicker answer is no, because Verizon will not activate any device that was not OEMed for them, as noted above.

At&t’s iPhone 5S will not work on Verizon or Sprint because it is not compatible with CDMA networks. The best way to check it is use Verizon"s BYOD page and type in the phone’s IMEI to check if it can work on Verizon.

You can use that AT&T version on Verizon, however you will definitely have coverage and signal problems. The AT&T/T-Mobile version lack CDMA chips, which provides Verizon with the best coverage. You will be only able to use the 4G/LTE towers.