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I brought a Nokia N8 (Dual Sim) from Bangkok. Looks to be a Chinese Variant. When i came to Mumbai and inserted Local Sim Cards (Vodafone), it shows as Invalid Sim. Phone shows all Sim Contacts as well as Sim messages, but can not make any calls (incoming or outgoing). please help ASAP

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If your phone displays the 'Invalid simcard' then your phone is currently locked to particular network. You need to unlock to use it with other network.
There can be many ways to Unlock your phone. As far as i know unlocking by codes is the simple and safe way. I will suggest the website Unlock-zone.com which is doing good service and they were recommended highly in the cell phone forums.
I used them to unlock my cell phone. contacted them and within 30 mins i had my unlock code and my phone was unlocked.
Hope this helps.

Posted on Jan 04, 2011

  • chevvaharish May 02, 2011

    i have also same problem and i found that it is not due to lock of sim since it is from china it did not have imei number check *#06# get imei number from any mobile shop........................................... and please please i beg you to contact me after that i am facing some problem after getting imei number also need to know is that same with you my e mail id chevva.harish@gmail.com

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Hi, i need restricted code for nokia c3 vodafone IEMI #358275041178175


hi restriction codes is nothing but your mobile is locked to particular network.due to this it accepts
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to solve this problem we can use software,cable ,codes etc....among them codes are the best .to get the codes
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Were you using this handset in Dubai or is this the first time? "Invalid sim" has two main issues, 1. sim lock, 2. sim connector problem.

First, open the battery cover, remove the sim card (if it's inside the battery compartment) and clean the metal contacts of the sim connector using a soft brush or ear bud dipped in alcohol or acetone or spirit. After it's cleaned, let it dry and again reinsert the sim card, install the battery and try again.

If it's been used before, then probably you still have the old sim card, if so install it and try again. If it's ok then borrow a sim card from a friend (for few minutes) or use your old or another available (working) sim card and try again. If both the old sim card and the other (borrowed) sim cards are working without any problem, then there's problem with your vodafone sim card which obstructs it to install on the Handset, perhaps voltage issue, in that case, you better get another replacement from Vodafone.

Or if the old one which you were using works, then your phone is sim locked, try to reset it using the default code 1122 or 3344 or 1234 or 5678 (should be on the manual) [click here for more info about china mobile codes]. To do this, go to settings, select "Restore" and enter the code, proceed forward giving positive inputs "yes" or "Ok".

After it's restarted, try again with all the sim cards.

If all the sim cards show the same error, then the handset might needs to be repaired or need to be replaced.

If you need further help, let me know.

Good luck.

Thanks for using FixYa.

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