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Can't enter unlock code

DaveD63

Lurker
Got the 6 digit unlock code from Sprint so I powered down my m8 and put in a Cricket sim card. Turned it back on and I just get "invalid sim card 4g services unavailable". I know this phone is incompatable with Crickets 4g services but all I want to do is unlock it. I was hoping that any sim would work.
 
If you want to use it on a GSM service, you are. There are plenty of Sprint MVNOs where you can use it.
 
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