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Hi, Your phone may be locked to its Network, that's why it shows "sim card not valid". In order to use other Networks, you need to unlock your phone. You can unlock your Nokia N70 using code.You can either get the unlock code from your service provider or from reliable online site. Superunlockcodes.com is where i unlocked my phone, they offered codes at affordable price, with simple unlocking instructions.
hi :)
cause the sim card are diffrent country,your software was in diffrent country version.
so made it phone cant read the card.
u can reload the phone software to use the simcard.
other way,just just buy another phone.
First you must find out gsm band of your network operator, then in your phone in settings//network settings//band selection choose that frequency(gsm band), or it maybe happening when you receiving a long message some model of samsung just block your phone and in that case you just put sim card in the other phone that is not samsung and wait for that message. When the sms is received, put it back on samsung. But if your sim card doesnt work in any other phone sim card is crashed. Call for your network operator for further instruction. By!!!
hi, don't panic! You mobile phone is fine, problem is with the sim card. Try inserting sim card in some other phone (Try Nokia) it will definitely work. If you dont hav different mobile phone then carry your sim card to customer care and they will change the same and give you duplicate sim. They may charge something for duplicate sim card.
the sim connector may be dirty and you can service it with methelated spirit by unscrewing it and allow it to dry before screwing it back, usualy with a soft mouth brush.
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