HI is your Nokia N97 mini mobile is displaying sim not valid message once you insert your sim in it then it mean your phone is locked to some other network provider due to this it wont accept any other GSM sim until you unlock it .You can easily unlock your phone using sites like SimpleUnlocking.com here they are rendering network unlock code for all mobile models at reliable cost.You first check that whether the code is available for your country and network provider .If yes then pay for it and unlock your phone then freely use it with any GSM sim .
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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