How can I contact my carrier
How can I make my phone to support sim
iPhone 6
How can I make my phone to support sim
iPhone 6
See this Apple article: How to unlock your iPhone for use with a different carrier
How to unlock your iPhone for use with a different carrier - Apple Support
Or do you need the PUK code?, See this Apple article: Use a SIM PIN for your iPhone or iPad
Use a SIM PIN for your iPhone or iPad - Apple Support
Who is my carrier:
Go to -> Settings -> Mobile network -> scroll to Network selection you can see who your carrier is.
See this Apple article: How to unlock your iPhone for use with a different carrier
How to unlock your iPhone for use with a different carrier - Apple Support
Or do you need the PUK code?, See this Apple article: Use a SIM PIN for your iPhone or iPad
Use a SIM PIN for your iPhone or iPad - Apple Support
Who is my carrier:
Go to -> Settings -> Mobile network -> scroll to Network selection you can see who your carrier is.
Surely you must know who is your cellular provider as you will get a bill from them every month. You need to contact them...
All carriers have a call center number. Google it
How can I contact my carrier