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Hi first of all after inserting Inserting Sim Card and power on your phone,,a message will prompt you to select "Start up phone without Sim Card" select NO. If there is no any option displays a there might be something wrong with Sim card related components.So try to clean the sim card slot.Otherwise you need to visit mobile repairing shop.Thank you
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.
Make sure, that your mobile phone is not country code locked.. Moreover, The SIM jacket is intact and there is no physical damage at the jacket's location..
Also make sure that the SIM card, you are using is valid, and is not physically damaged (You can double check it by putting it to some other working cellphone).
someone or you might have coded that phone with a line different from the current line so you must deactivate that code by inserting the formal line.or if you dont know the code you have to flash the phone.
Offline mode means the sim you have inserted was not detected by your phone.Firstly clean the Sim Card slot(case)and check the connector.If the problem still persist contact nearest mobile repairing center. Good luck Visit Again...........Fixya.com
sir/ma'am, in some other phone offline means insert sim, so u have to try to put the simcard properly then test, if the problem still, it is need to repair go to service repair center to fix the phone,
when it turns of in offline mode, turn it off again everytime. after few times, it should ask you before the logo shows up "DO YOU WANT TO CONTINUE IN OFFLINE MODE?" SELECT NO, AND VIOLA. ITS IN GENERAL MODE
where did you bought your phone? if you bought it from a telecom's promo it means that your phone is locked to a single network provided only. you can ask a technician to have your phone OPENLINE for you to be able to use any kinds of sims.
if it's not the case, check the slot for sim and make sure that the sim is properly placed. restart it without the sim and then restart again but now with the sim.