Old phone was Sprint. Took the Sprint card out and put into an unlocked Verizon Iphone 7 rebooted the new phone with the sprint Sim card in it. Message appears on phone after reboot as the Sim card has locked please power cycle the device and if the problem persists contact customer service. Is going to sprint to undo our only option?
If you get an alert about the SIM card in your iPhone
https://support.apple.com/en-us/HT201420
SOURCE: iphone and sim card
i have the same problem. it worked for the first day or so, now i can't access contact info on sim card or send or check text messages.
SOURCE: my ATT sim card locked on my sidekick and it wont unlock
Go to att.com log in to your account and under phone devices there is a link to obtain a puk code but it has to be entered using Att phone. That was how I unlocked my sim card.
SOURCE: how 2 unlock audiovox 8910 phone?
See this post:
http://mobilenetconnect.com/unlocking-an-audiovox-cdm-8910-cell-phone/
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