Memorable mobile phone numbers are commonly termed 'gold numbers'. Gold numbers, platinum numbers, diamond numbers - these are all terms used to describe memorable mobile numbers for which there is now a very active market. The most popular forms of Gold Number are: Couplets, 07XXX 00 66 22; Trebles, 07XXX 222 333; Single digit: 07XXX 888888. Examples of memorable mobile numbers include those that support a clear sequence e.g. 07XXX 123456. Others might be made up of a single number e.g. 07XXX 888888
