How do I change the phone number after changing my SIM card?

[icarothomas]

So, I had a phone number saved in here, but a few days ago, I had to change my SIM card number. I've tried to change the number in here to my new one, but it always sends an SMS to the ol number. How do I change it without having the old one with me? I've tried to see if anyone already has my old number, but a guy from the phone company said that the number counts as deactivated and is only used again after six months.

[Glimmer]

Contact Support. They will ask for Proof of Ownership so have that on hand.
https://support.steampowered.com/kb_article.php?ref=2268-EAFZ-9762

[icarothomas]

and how do I get that?

[Beardface31]

Αναρτήθηκε αρχικά από Ztrawuhcs:

and how do I get that?

https://support.steampowered.com/kb_article.php?ref=2268-EAFZ-9762

[icarothomas]

I asked about that proof of ownership

[icarothomas]

is that a credit card information, like it's described in there? then i'm gonna try, thank you very much

[ReBoot]

Αναρτήθηκε αρχικά από Ztrawuhcs:

is that a credit card information, like it's described in there? then i'm gonna try, thank you very much

https://support.steampowered.com/kb_article.php?ref=2268-EAFZ-9762
This article describes precisely what is proof of ownership.

[icarothomas]

I used my Orange Box serial key, like is described in it. Thank you very much!