Connecting to the internet with a Rami Levy SIM card

I recently bought a prepaid SIM card from Rami Levy for my unlocked HTC 7 Mozart. Unfortunately, I was unable to access the internet at first, despite having turned on the mobile data connection.

Setting the APN manually caused everything to work correctly. These are the details I used (source):

Access Point: internet.rl
Username: rl@3g
Password: rl