My iPhone 5 was unlock then it's locked
i used to use my iPhone 5 in Egypt then i travels to south korea and used it then to china and it was ok
then i arrived to Egypt again and when i inserted my Sim Card it showed this message
The Sim card that you currently have installed in this iphone is from a carrier that is not supprotedunder the activation policy that is currently assigned by the activation server. this is not a hardware issue with the iphone. please insert another sim card from a supported carrier or request that this iphone be unlocked by your carrier.please contact apple for more information.
It 's weird because i used to use it in Egypt .
thank you
iPhone 5