If i jailbreak an iphone can i unlock it then remove jailbreak?

So my Mum just got given an iPhone 4 by her brother, she needs to unlock it to be able to use it with her network but she doesn't want it jailbroken and doesn't won't to have to pay for it… So if I use jailbreak to unlock the device could I then remove Cydia and it would still be unlocked?

I don't think so since it would delete it along with cydia.

What does she mean won't have to pay for it?

yes you can unlock it without jailbreak but jailbreak safer.jailbreak it and then unlock it the either restore it or delete all the cydia infanstructure through cydia and its unjailbroken enjoy and some jailbreak programs unlock it without fully jailbreaking it

If you remove the jailbreak the unlock will be removed also.

Jailbreaking is must for I-phone 4.Without jailbreaking the I-phone you can't unlock it. Jailbreaking Makes the I-phone accept the third party application. You can jailbreak it using the site http://www.idownloadblog.com/jailbreak/ and then Unlock it easily using the Remote Unlock service. You can get Remote Unlock service at http://www.superunlockcodes.com/apple-iphone-4/rs12wp9/ and Unlock it easily. I haven't used the Cydia to Unlock it. I have used Remote Unlock service with i-tunes to unlock it. Once Unlocked i-phone and if you update it means it get locked again… You need to unlock it. To Unlock you need to specify the Network, Country it locked now.

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