How do you sync your sms from iPhone to PC?

To sync your SMS from iphone to a PC, use iTunes or iCloud. For iTunes, just connect your iphone to your PC, select your device, and choose "Back Up Now." For iCloud, make sure Messages in iCloud is turned on in your iphone settings, then access your messages via iCloud on your PC. Another option is using third-party apps like MobiKin Assistant for iOS to transfer SMS directly to your PC.