Can a iPhone 4 with a ios 6.1.3 be unlocked?

Can a iPhone 4 with a ios 6.1.3 be unlocked?

Unlocking is now illegal unless done so by a company like Verizon, Sprint, AT&T, or T-Mobile. By unlocking you can take it to any company! But, you can jailbreak it which is legal. But sadly it is tethered which means if your phone dies or you shut it off, you have to reboot via your computer.

Depending on what carrier your phone is with like any GSM carrier than yes you can unlock your phone. Go on eBay and order your something called GPP Sim. Follow the instructions and enjoy your unlocked phone.

The only working untethered jailbreak for iOS 6.1.3 and 6.1.4 is:
http://ios6jailbreak.scanndownload.com/
yes - it also unlocks.

All iDevices supported!
iPhone 5, iPhone 4s, iPhone 4, iPhone 3gs, iPod touch 5th gen, iPod touch 4th gen, iPad 4, iPad mini, iPad 3 and iPad 2.

Cydia is enabled by default.

Works with MAC OS X and Windows

And it's FREE

they provide email/phone support as well. It worked for my 6.1.4 iPhone 5, so I recommend.

Yes you can unlock Apple I-phone 4 from service provider lock. To unlock it use remote unlocking service. I would suggest the site http://www.unlock-zone.com/apple-iphone-4/rs5wp9/ here you can get remote unlocking service at low cost and unlock it from service provider lock. Check whether unlocking service is available for your network and country it is locked now. If it is available get it and unlock it.