There are two possibilities available
1.There may be a problem in your sim card so try another one
2.Your mobile locked to particular network provider
If it's network lock means,try to unlock your Nokia E63 phone with a help of Theunlockarena.com Here you can unlock your phone at low cost.
SOURCE: sim not valid
Its a service provider locked phone
try to unlock it with unlocking device (UFS-3 or JAF)
or if u know the operator code u can send me with ur phone IMEI
i'll fix it
SOURCE: SIM card not valid
Hi thee, I list here the possible reasons for "Sim card not valid"
1 - The phone is locked to a different network. In this case the phone usually accept the sim card the same , and has no network, but sometimes it may return the error message. Unlock the phone at a local shop.
2 - the SIM card is faulty. Test the card on a different phone to find out.
3 - The phone is faulty. Test the phone with different Sim cards, if the Phone returns same error on all cards, then the phone is faulty.
SOURCE: sim card not valid
Friend i have same cell phone and i am also facing this problem but dont worry
go to network menu and select Automatic network that problem will be solved if not them show it in to nokia care
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