Old service carrier

[kaylaz]

I am unsure why I need to provide my old account information from my previous carrier?

[jetherton]

If you are porting your number from your old carrier to Visible they need your old account number and PIN and maybe some other information such as zip code.  When I switched from Verizon I was able to generate a "transfer PIN" that was only good for a few days.

If you are obtaining a new number then Visible should not need any information about your old carrier

[ScratcherGuy]

This is standard practice when porting a mobile number.  Some landline carriers also do this as well in addition to TPV (Third Party Verification).