What is imei unlocking Telus iPhone 4 from Canada?

IMEI unlocking is use to unlock iphone. When we bought a iPhone it is locked to a single network (e.g. Fido, Rogers, Bell, Telus) depends upon which network or data plan you choose. That means you can`t use it with other networks/provider it is restricted to a single network. & If you want to use it with other network you need to unlock it which removes that restrictions from your Telus iPhone 4. This is known as iPhone imei Unlocking or iPhone Network Unlocking.
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