Let me introduce myself, Rauf from India. Sir I have been gifted samsung C-300 which was bought in UK. The problem is whenever I insert any sim in my new mobile it flashs on screen invalid sim card but the same sim cards i am already using in my preveious mobiles.kindly help me out with this problem. Thank you Regards from Rauf.
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Re: invalid sim card
Ok slam alikum rauf its waqas from pakistan.i have read your problem .i wana ask you have you open the country code of this mobile if not then open it from mobiles software service .if already open then there is another fault in your mobile inside it (sim drivers inside the mobile is faulty) you should local repair it ok and tell me again thanx
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If your Nokia X6 16 GB Displays invalid sim card while inserting other Network GSM sim card like MTN ? It is locked to network.You need to specify which country and network it is locked now.I have bought an Nokia X6 16GB in INDIA but it was locked to Australia Vodafone network .I have unlocked it and now using it in USA AT&T network sim card.So you can unlock your Nokia X6 16GB from current network lock using the unlock code from the site Onlinegsmunlock.com after unlock it use with MTN network sim card or any GSM pay as you go sim card it will not display invalid sim card message.
Your phone is locked to its carrier. In order to use a different carrier, you should first unlock phone!!!You can use codes to unlock your Samsung SGH-E900! Unlocking using codes is easy and the safest method!! You can get the codes from your service provider or from reliable online sites like onlinegsmunlock.com .You can get the codes by specifying Your phone's manufacture, model,country and network!The steps to unlock is simple here and the codes are affordable!!!!
If the Samsung C3050 says invalid Sim means it locked to network ...you need to unlock it...You need to specify the network locked in spain...I have unlocked my SAMSUNG C3050 from Vodafone spain using the unlock code from the site Simpleunlocking.com/samsung-c3050/rs16wp9/ and got the free UNLOCKING instructions at here Mobileunlockguide.com and unlock it step by step.So you can unlock it and use woth any GSM Network Sim card.
You can unlock it by flashing your mobile if your mobile is a CDMA mobile... The procedure for flashing your mobile is in the link below http://hubpages.com/hub/How-to-Flash-your-cell-phone It has an video explanation.
If you changed your SIM card, you should have the new SIM card/ Phone number settings for the Internet and MMS. Try deleting the old settings (from the previous SIM card).
If you are sure that you have the right settings. Check with the service provider, the problem could be at their end.
You're probably trying to use a SIM card from a network not supported by the country you're in.
Some networks don't have a roaming agreement between two or more networks service providers to enable the users of one service provider to use their services.
Purchase a new SIM card from a popular network in that country. Ask them to unlock your phone at the same time, because it might be locked on the original network, like Orange, Vodafone, t-mobile etc...