The "Next" button in "https://store.steampowered.com/phone/add" is not clickable.

[76561199033923599]

When you proceed to the website and type the number you want to verify, the number is somewhat not recognized. I tried to copy the International format (example) and replace it with my number but it still doesn't work. The International format seems to be accepted while my number is not. I also tried different number of my own and failed. I'm 100% sure that these numbers are existing and not made up. Anyone, help?!

[cSg|mc-Hotsauce]

Contact support at the bottom of this page... https://help.steampowered.com/en/accountdata

[MalikQayum]

probably has to do with the number you are using. you might find some answers here:
https://steamcommunity.com/discussions/forum/search/?q=philippine+number

[76561199033923599]

This morning, I tried to use my sibling's number and got lucky. It was somehow recognized so I had to used it for my account. It is not mine but whatever; as long as I can make it verified, it is all fine to me. Thanks for the effort anyway.