There are many cell phone providers and to ensure that the customers stay loyal to their service the cell providers sell you a locked phone. In a phone that is locked you cannot put another SIM card from a different provider. If you want to use your mobile phone with another service provider then you need a code for phone unlocking from previous provider or 3rd party.

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For the process you need a IMEI number. Here is the process in which you can do it.

First you need to check the SIM card compatibility of your mobile. Mobiles with a slot for a SIM card and GSM technology only is possible for unlock and you can use SIM of service provider that you like. If you use a CDMA phone then you cannot place a SIM in it. A SIM card slot lies behind your phone battery so to access it take out the phone cover from the behind and the battery needs to be taken out.

You will have to call your old service provider and request for a code for unlocking your cell phone. You will be entitled to a free unlock code if you have used your mobile for 3 months or more and are still on cell phone agreement of service. But if you have not used the mobile for 3 months and have broken the service the agreement then you can get a code for unlocking from the third part company. The unlock process for each phone is different, so you need to get specific instructions for the unlock code from the operator or 3rd party company.

You will need to buy the unlock code for third party company. Before you start the actual process you need to know the IMEI number which is unique to your phone you need to dial “*#06#” and send the number. Then you will receive a 15 to 17digit IMEI code. Once you receive the it send it to your service provider or the unlock company and they will in return send you the unlock code and also the step to step instructions about unlocking your cell phone. Follow them carefully and you can unlock your cell phone.

Once you unlock your mobile phone you can use it with a SIM from the service provider of your choice. Find More tips in technology blogs, By buzz2fone blog directory.