US giant Citi has begun offering customers contactless payments stickers that can be attached to the back of mobile phones.
Citi has quietly rolled out the option for customers who request it via the bank's Web site, using the tag-line: "The back of your phone just became its coolest feature".
The Citi payment tags, supplied by Oberthur Technologies, enable customers to make payments of up to $50 at the point of sale at MasterCard PayPass readers.
It is linked to customers' Citi credit card accounts with purchases appearing on monthly statements.
