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Hi I am usine micromax Q1 mobile. now mobile showing INVALID SIM. how to resolve this problem

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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

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Posted on Jan 02, 2017

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RAGISTRATION FAILED


Have you tried with another Sim Card? If not do so now. In case sim card is not the problem then this must be 1. sim ic (sim controller) problem, if you don't have idea, better go to a repairing shop to get it done, otherwise you might create another damage. 2. Firmware problem. You'll need to flash your mobile if this is the culprit.
Good luck. Thanks for using Fixya.

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