how can i get my iphone unlocked

If your iPhone is locked as you have forgotten your password go here - If you’ve forgotten your iPhone passcode – Apple Support (UK)

If your iPhone is carrier-locked and you would like to use your phone on a different carrier, you should contact the carrier, of which your device is locked to. Go here - How to unlock your iPhone for use with a different carrier - Apple Support

First, tell us how it is locked, then we can provide the best solution.