Hmmm.. that's a bit weird, if you have not had a 48 free trial before and this is your first time logging in on a mobile device, you should contact Spotify directly here, and let them know what is happening. If you get an automated reply, just reply directly to that email and you should get a response back soon. :) Also, you can also try the 30 day trial here!
Hope this helped :)
Don't forget to add your Kudos and mark as a solution if it helped you!
I find it strange that when you try to register by phone or facebook "invalid username and password" also appears ... attempt to create an email and says there are problems with spotify and fixing it ... however when creating the account from a computer if you create the bill perfectly both facebook and email. Will you see that? ... We trying to enter from the cell to give mom and not 48 hours. We'll wait until tomorrow