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I got iphone 4 from my friend and when i insert a sim in it, it displays no service, what's the problem and how to fix it??
I got iphone 4 from my friend and when i insert a sim in it, it displays no service, what's the problem and how to fix it??
I got iphone 4 from my friend and when i insert a sim in it, it displays no service, what's the problem and how to fix it??
Has the phone been officially unlocked?
iPhone: About unlocking
This article mentions some troubleshooting tips:
If you can't connect to a cellular network or cellular data - Apple Support
I think the phone might be locked to a particular network. I suggest you can approach Classicunlocking.com and specify the country,locked network of iPhone 4.Based on the availability you can get the permanent unlock service along with free instructions.
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