Second phone - game phone

Hello!

International player here.

I use my game on a second phone so that my personal phone battery doesn't die quickly.

The last two days I couldn't log-in with my line email and password. Has anyone had this issue?

Line is on my personal phone, not my secondary phone but usually the email and password lets me continue playing on the same profile. I am not looking to transfer my account to the secondary phone.

Any help is greatly appreciated.

Thank you.