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Remove back cover and remove battery and check sim is properly fixed in side sim slot or not. If sim is loose inside sim slot then put some paper packing make it properly fixed also remove sim and rub with cotten lock the golden part of the sim and insert again. Also check the sim in another mobile and if in that mobile sim also not recognized then there is issue with your sim card replace it.
here is how to sim unlock mobile

Jul 21, 2017 | Cell Phones

4 Answers

T mobile note 4 Sim unlock code.

Unlocking a T-Mobile Android device is pretty easy and straightforward. Through the use of the Mobile Device Unlock App you can now unlock your phone with just one tap. Easy, fast, and convenient - UnlockBase can help you with all your mobile unlock needs.
Just make sure you go through the T-Mobile unlock requirements and policies:

Read more about A Complete Guide On How To SIM Unlock A T-Mobile Android Phone

Dec 24, 2014 | Cell Phones

1 Answer

Changed SIM card from Motorola RAZ to Samsung Impression

Hi i think your mobile is locked by particular provider. So only it didn't accept sim card in your samsung impression mobile. If you want use your sim card in samsung impression mobile. First you must unlock your mobile. You can easily unlock your mobile by using unlock code. If you need unlock code you can visit this site here you can get the code and unlock your samsung impression mobile easily. After unlock your mobile you can put any other sim card in your mobile phone.

May 20, 2014 | Samsung SGH-A877 Impression Cell Phone

1 Answer


If you want to unlock your Samsung GT E2652 mobile phone from the sim lock,I would suggest you to get an unlock code from Unlock Zone Unlocking the Samsung E2652 Champ Duos mobile phone at reasonable price and unlock it using the unlocking instructions given for your mobile phone from Mobile Unlock Guide .

Jan 17, 2014 | SAMSUNG GT E2652

1 Answer

When ever i insert a sim card in my nokia phone it tell me invalid sim i want to know why, and the solution to it

Have you tried to insert your SIM in a contracted mobile? is you try to insert your SIM in contracted mobile,it will not allow any other to get rid of this problem you have to unlock your mobile by unlock codes...for unlock codes you can contact your provider or can get it from online providers..what is your mobile model? if its basic model then try getting unlock codes from unlock-free to get unlock codes for free by just submitting your mobile's imei number and get unlock codes to unlock your mobile..if your mobile is of recent model then try with unlocking4u and get codes and unlock your mobile..

Sep 06, 2011 | Cell Phones

1 Answer

Sim not function

Have you inserted a valid SIM card? what is the problem? when you insert you Sim into your mobile do you any of the message like this "Enter Restriction Code or Enter Unlock Code" if so your mobile is locked to your current network and unless otherwise you unlock it,you cannot use your mobile with other provider's sim in your contracted can unlock your mobile by unlock codes and for codes you can contact your provider or can get it from online providers..once i got unlock code for my mobile from mobileunlocksolutions and unlocked my can too try getting codes from them and get your mobile unlocked..and before unlocking your mobile get clear idea about unlocking procedure..visit mobileunlockguide to get step by step instructions about unlocking your mobile..

Aug 09, 2011 | Nokia 2730 Cell Phone

2 Answers

An other sim not excepted

it means your mobile is locked!!

Aug 04, 2011 | Health & Beauty

3 Answers

How can i unlock my t mobile phone

If you wanna unlock the t mobile make use of this site , using unlock code specified in it you can proceed UNLOCKING your mobile without vain ...

May 25, 2011 | Cell Phones

1 Answer

How to unlock rim gsm mobile


Mar 12, 2009 | LG KM500 Cellular Phone - Unlocked

9 Answers

T mobile wing unlock code

Call your cell phone carriers customer service and they may email you the unlock code and instruction for free within 24-48 hours. Tmobile did this for me several times on different phones. Tmobile will send you the unlock code and instructions via email for free for their customers within 24-48 hrs. But you have to call their customer service (US) 800-937-8997. I tried emailing them initially but no response. When I called they were so accomodating and didnt even ask why I wanted the phone unlocked.
Once they send you the code its simply inputting the code they provide. However to do this you must first put in a non tmoile sim. As far as I know this is only cingular or a foreign pay as you go sim card. Luckily I had a foreign sim that I saved on a prior trip as I have other unlocked phones and this worked for me. None of my friends had cingular so I could not use their Sim to do the unlock code on my phone. Nextel, Sprint and I think Verizon also dont use sim cards.
Alot of cell phone stores and kiosks will also unlock any cell phone for you for about $30.00. You may have to leave the phone with them and pick it up later like an hour or two later if they are busy.

Dec 12, 2007 | T-Mobile Wing™ Smartphone

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