I am buying a used iphone 12. Called the Softbank English line, and they said "not guaranteed all services will work" with the Softbank nano sim in my current iphone SE 8 when inserted into the used iphone 12 originally bought from a rival carrier. What kind of problems are likely to occur? I read about 5G being a problem, but not sure if I even use that. Will it slow down or freeze the phone?
iPhone SE, iOS 13
This is a very bad idea. If the phone is from a rival cellular carrier, it will be locked to their service. They won't unlock it for you without signing up for their service and it will never work with a different carrier's service.
If by some miracle it does work (but it won't) then -
If the SIM came from an iPhone that didn't have 5G, yes it may not get 5G on your phone. Getting a new SIM chip made with 5G capabilities would fix that.
The SIM chip only carries information about your phone number, it will not slow down of lockup your phone.
This is a very bad idea. If the phone is from a rival cellular carrier, it will be locked to their service. They won't unlock it for you without signing up for their service and it will never work with a different carrier's service.
If by some miracle it does work (but it won't) then -
If the SIM came from an iPhone that didn't have 5G, yes it may not get 5G on your phone. Getting a new SIM chip made with 5G capabilities would fix that.
The SIM chip only carries information about your phone number, it will not slow down of lockup your phone.
japan softbank iphone8 upgrade to 12 from another carrier, will the nano sim work?
