I just signed up for a premium account as well and I'm having the same exact problem. I was told there was a server error and I should be able to login once it's up. Not the best first impression though!
I have a exactly same problem, please someone tell me how to solve this ? I've just start to have free 30 trial for mobile and it works well on website but not working with mobile. I've deleted it n downloaded several times n its really annoying
If this is a new account, you must have joined with a facebook login on your desktop. Make sure you have the facebook app installed and up to date on your mobile, than log in using the facebook option and everything should work.
Ask again if you still can't get things to work on your mobile device. Information on the device, ios version and the steps you take to log in and what messages you get would be helpful.
You need to log in with the same credentials you used to create your account. If it was vreated with your facebook credentials, you have to log in with those on all devices or you'll end up creating a new free (no subscription) account.