Now with re-designed payments screen, single click option to re-skin, HTML5 compatibility and more.
PayForIt was one of the first services in the world to enable payments from mobile sites to be charged direct to the phone bill - whatever the operator.
The fourth version was launched today at The Connected Summit event in London by UK trade body AIME.
Some significant amendments have been made to the system, largely with the aim of improving the payments flow to reduce payment drop-offs by users.
Thus, merchants can now choose between an embedded or pop-up pay screen or select a full screen version. They can also re-skin them within certain parameters.
The payments screens themselves have also been re-designed graphically to reduce clutter.
The new version is HTML5 compatible, meaning payments can be made from a hybrid app without having to migrate away from it to a browser.
But perhaps the biggest refinement is the ability to offer users a single click payment flow after the first sign-up.
Other upgrades include tablet-compatibility and the ability to send marketing messages via SMS with a link that re-directs straight to the PayForIt payment screen.
AIME is confident of a big take-up of the new scheme, which is officially available from 15 intermediaries from May 31st. It says PayForIt grew 33 per cent in 2011.