Question about Cell Phones
My videocon v1688 doul sim invalid imei
Posted by Anonymous on
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Posted on Jan 02, 2017
SOURCE: Showing INVALID SIM
try *2767*3855# this will reset the software and unlock your phone to all network, but make sure you backup all of your photos etc before tou type this code in.....Chris
Posted on Aug 08, 2007
I have on ZTC K300 china mobile. I started to have this problem at this week...
My SIM 1 is working normal, but the second one says ''Invalid SIM card''. When i check the IMEI´s, this mobile have only one IMEI instead of 2. The mobiles with 2 IMEI´s is working normal... Have any thing i can do to add a new one IMEI to this phone, so i think and i hope will work?
Posted on Dec 11, 2009
When you place a new or a existing SIM card from another phone provider into your mobile phone and it asks for a Security Code then :-
This phone is locked to the original mobile phone provider. You need to contact this mobile provider to ask for the unlock code (Security Code) for this phone. You need to provide proof of ownership etc and the phone's unique IMEI number which is located inside the phone under the battery. They use this number to generate the unlock code for your phone.
They should provide you with instructions on how to enter this code into the phone.
Once you unlock the phone, then you can insert a new SIM card in this phone or sign up with another phone provider using this phone.
You could ring the phone provider and ask for the unlock security code because you are going overseas and wish to use your phone with a prepaid SIM card from another country. This may be a free service.
The other way to get your phone unlock is to use a phone unlocking company on the Internet, they usually charge a couple of Dollars for their services. Use Google and search for "Security unlocking code” companies in your area.
You can also try this WEB site :-
The IMEI number is unique the each mobile phone.
The number is printed on the label under the battery.
You can also get the IMEI number by entering this on your phone
*#06# It will then display your IMEI number and you may also get a unique global serial number. Your IMEI number should be 15 digits.
Posted on Feb 01, 2010
Hi vitain, go to or call vodafone some of the carriers have been blocking the use of the i9's as they all seem to share the same imei numbers. Go and register on the below website and head to FAQ part and search invalid sim there is detailed instructions on how to change the imei number (way to much to put here).
Posted on Mar 22, 2010
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