How to open country code of iphone 4?

I have get iphone 4 from uk, but its asking for country code. How can i open it

Look up your country code on google and just put it in

If you want to use your iPhone 4 with other carriers, there's a service called Remote unlocking. This unlocks your phone from its network and allows you to use other carriers. You can get this service from online sites.http://www.unlocking4u.com/apple-iphone-4/rs6wp9/ is where i unlocked my iPhone, Check it out! Hope this helps you!

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