where do I put in a phone number?

[FrootLoopy]

Trying to buy something on Ebay, and the seller requires a phone number. The link in the Ebay message doesn't work. I can't find anywhere a phone number would go in the personal information section.

Where do I look??!!

Never mind, found it in the 'change address' section. Didn't realise there was a phone number there as well, been AGES since I last updated that!