There are various ways to check your iPhone Carrier in case you do not know which one was there...
Checking is Helpful to for factory unlock your iPhone
It will also show if your iPhone is Locked/Unlocked "Lock/Unlock" Status
Website link: iPhoneOperatorCheck.com Enter your IMEI and you will get all the info
Application: An application called iPic can be downloaded to your machine to check iPhone carrier which comes at a certain price. However, you can find cracked app as well
iPhone App: You can download app called iCarrier from AppStore and check your IMEIs for network and lock/unlock status
Note: If you have not yet activated your iPhone, you can not come to know the carrier info from any of these tools but you need to contact individual severs who may charge you for such info
Hope this may help you, Guys! Keep posting
Checking is Helpful to for factory unlock your iPhone
It will also show if your iPhone is Locked/Unlocked "Lock/Unlock" Status
Website link: iPhoneOperatorCheck.com Enter your IMEI and you will get all the info
Application: An application called iPic can be downloaded to your machine to check iPhone carrier which comes at a certain price. However, you can find cracked app as well
iPhone App: You can download app called iCarrier from AppStore and check your IMEIs for network and lock/unlock status
Note: If you have not yet activated your iPhone, you can not come to know the carrier info from any of these tools but you need to contact individual severs who may charge you for such info
Hope this may help you, Guys! Keep posting