I think it is possible. If the old worlds/characters have the same file extension as the old Mobile version.
From here: Terraria Mobile 1.3 Local File Structure, Explained You would copy your files into the "OldSaves" folder, and after you start the game, it should convert them into new files to be compatible with the new update. It is worth a try.
Great! Thank you!! I'll give that a try! Loving this update!!!
And I would like to say that I love the new UI and controlls! It had a bit of a learning curve at first but it becomes easier with practice, time and patience! I hope more people who feel the same will post as well! I've read a lot of posts about the UI and controlls that weren't the most positive . For everyone involved in this update as well as the Moderators of this forum, Thank you! Its been a long road and a lot of hard work and it shows in the end product! I, for one, greatly appreciate it!! Thank you again!