If only you had any idea just how many of those "smart" phone IP addresses randomly assigned to those phones each and everytime you use them, have made it onto the international spammers and scammers lists...lol.I usually use my phone to use this very forum.
You would be surprised just how many have been rejected/denied forum memberships solely because of those IP addresses were previously used by spammers and scammers.
I always tell folks when they contact us as to ask why the system automatically rejected them, I ask them were they using a cell phone to join up, the answer is usually yes...lol...I then tell them to try with their own home computer that usually has a "clean" IP address and then they will be able to use their cell phone thereafter.
The same applies to random IP addresses used by many of the most popular VPNs as well...lol.