Line can be extremely useful if you can get it set up but customer support is atrocious. I'm convinced they are using some automated response system because their responses repeatedly ignore what I typed.
I Initially downloaded the iPhone version of the app on my iPad before I had a smart phone but I could receive the SMS text for confirmation BUT it was a pain to use on iPad. Still I needed it for some online gaming communities. Later I got an iPhone and thought I could use the same account on both. They probably need better translations to English as the descriptions seem to suggest that you can use the same account info to log in on two mobile devices yet their are now many disclaimers stating that you can not and that your previous account on another device will be deleted if you do so.
So I lost my first account, all contacts and communities. Somehow I was able to get seperate accounts on both devices and started over but the Line app on my iPhone literally froze on a group chat. It would not update the chat past that point and would not refresh even after updating the app so I had to delete it and reinstall it. If you do this and sign in with your previous iPhone account info it also deletes everything even on the same device! Two accounts both with sticker purchases lost and could not get any help from Line support to restore old iPhone account. The app would load but reject my login ID and password so I just did without the iPhone version for a while
Got a new iPhone 6+ and was having to upload pics from my phone to my Google Drive and then download to my iPad to share pics which got to be pain so I just decided to start over with a new iPhone account but first I checked which of my two email addresses was listed iPad account to ensure I did not use that one when I registered a new iPhone Line account. I did notice that my cell phone number was also associated with my iPad account at that time. Guess what? Despite meticulously verifying that I used my other email address when I created a new iPhone Line account with the other email it still deleted my iPad account which had the most sticker purchases on it and again I lost all contacts and group chat history along with access to those.
I have sent two support tickets into Line since my first one in which their first response gave me instruction on a way to restore purchases on my iPad after creating a new account however Line will not let me create a new account on my iPad and I can't follow their instruction without successfully creating a new account on my iPad to restore my purchases. Classic catch 22. To create a new account on my iPad Line wants me to enter my cell phone number which according to their disclaimers would delete my new iPhone account that I just regained most of my contacts and chatrooms. If I can keep the iPhone account I now have AND get a new iPad account registered I can invite my iPad account to all those rooms and contacts easily enough myself.
The other option is to link my iPad account to Facebook for verification. Sorry but no I did that once for Fish Labs GOFA for some free credits after which everytime I opened the GOFA Safari opened up redirecting me to log into my FB account. By time I completed that which was annoying enough the GOFA app timed out connecting to the servers. I spent months trying to resolve that as both Fish Labs and FB denied any responsibility for this behavior and the Apple Store found no malware so my only solution was to disable Safari. I mostly use Chrome anyway but every link in an email or on Line I wanted to open I now had to copy and paste into Chrome to open. I will never again link any third party app to my FB account.
Despite sending two follow up support tickets to Line explaining that Line will not let me create a new account on my iPad they repeatidly refer to their previous instruction on how to request restoring my sticker purchases from within the app. If I could reach Line "Support" in person in Japan I would be about ready to strangle someone. Even on the iPhone 6+ my big clumsy fingers type more wrong letters than right ones so I rely on my iPad with Blutooth keyboard for 90% of Line interactions but I still want more mobile access from my phone and the ability to share pics direct from my phone.
Grrrrrr