Even though Line warns you about loosing your chat history, just go head all of your data will be just like you left it.

When Line asks you about restoring the chat history say no. Start LINE on the new phone and log in.Click 'Write changes' then exit, and copy the modified file back to /data/data/jp./databases/naver_line

Type delete from setting then press the Execute button.Open this file in SQLiteBrowser, go to the Execute SQL tab.On the new phone, install Root Browser, and use it to copy /data/data/jp./databases/naver_line to your /sdcard/, then transfer it to a desktop computer (via ADB or email).On the new phone, install LINE (don't start it yet), launch Titanium Backup and use it to restore LINE (App+Data).Copy the Titanium Backup folder (typically /sdcard/TitaniumBackup/) from your old phone to your new phone.On the old phone, make sure LINE is not running, launch Titanium backup, and backup LINE (App+Data).Install Titanium Backup (free) on both phones.Root both of your Android phones, old and new (absolutely required).Make sure Letter Sealing is disabled in Line settings on your old phone (you can re-enable it after this is complete).Even if you never set one, it will ask you so better set it now. If you don't remember your LINE PIN code, now is the last chance to change it, LINE will ask for it after you switch.

Warning: LINE only allows one active phone, and will destroy data on the old phone as soon as you log in on the new phone, so be sure to correctly perform this procedure BEFORE logging in on the new phone.

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