Board Thread:News and Events/@comment-26176272-20150306192838/@comment-26005122-20150307001020

If you're changing to a different OS, say from iPhone to Android, or visa versa, none of your data will carry over. And will have to start from the beginning again. But if you're keeping the same OS, just going from one iPhone to another iPhone, you'll keep your data.

Reinstalling LINE after deleting it, normally will keep your info. There are situations that will delete your account info, so depending on what your situation is, it may or may not keep your information.