Visible

I just today went on this site here to have a SIM card sent to me and then I would start service when I initiate the SIM card in my phone, but the site right away started asking me for my porting information. Is this normal or did I do something wron...

I'm coming from Tello as my carrier, but there is no option for Tello in the drop down for moving my phone from Tello for porting my number to Visible. Any ideas?