Actually I am living in Thailand but my job is in Korea. When I got back to Thaland last 2 weeks I change Sim card to Thai sim and noe I am coming back to Korea. My previous Korean Sim card show "No service". Can anybody suggest about this?
iPhone 7 Plus, iOS 10.3.3
Hi
It may help to follow the steps here:
If your iPhone or iPad shows No Service or Searching - Apple Support
They include checking for any carrier updates:
Go to: Settings > General > About - you will be advised if an update is available for installation.
(Note that Apple advises that you should not force restart your iPhone unless it is unresponsive and cannot be restarted normally:
first try restarting your iPhone through holding both the awake/sleep button and home button until you see the apple logo.
If that doesn't work, then check the coverage of your sim carrier at your location, and if it is covered, the you have to contact your carrier service as your sim might not be valid anymore
Hi
Sounds like iPhone is locked to the last network provider only they can remove the simlock to use with any simcard.
Cheers
Brian 🇬-1F1E7;
no service when change sim card - iphone 7
