I just bought a certified pre own iPhone 6s Plus from Gazelle store and wanted to use with Metro Pcs carrier but when I put a SIM card in from an old iPhone 5s that was used with Metro Pcs an error messages said this phone doesn't support this SIM card . What should I do ? Does unlocked iPhone 6s Plus work with metro pcs ? Or some other carrier ? I thought an unlocked phones should works with most carrier. Please anyone help . Thanks
You have to talk to the carriers. They have to unlock your phone to go to carriers, and only certain carriers will allow service to certain devices. You'll have to check and contact the carriers to unlock your phone. If your phone is unlocked but it isn't showing as such, follow this.
If your iPhone or iPad shows No Service or Searching - Apple Support
It means the iPhone is carrier locked, that's why you cannot use a different SIM.
Note: Only the carrier that the iPhone is locked to can officially unlock iPhone.
iPhone 6s Plus unlocked
