Mobile payment service iZettle says American Express has joined its list of financial backers. The latest funding round already included over £20 million from MasterCard and venture capital funds including Greylock Partners, Northzone and SEB Private Equity plus initial investors Creandum and Index Ventures.

iZettle will use the funding for product development and expansion into new markets.

A new study from Visa and Fundamo, the mobile money platform Visa acquired last year, reveals that the majority of consumers in six developing countries are already aware of mobile money services.

In addition, nearly 90% of consumers expressed an interest in making payments or sending funds from their mobile phone in the future.

Project RAY, which designs accessibility tools for blind and visually-impaired people, has announced a new mobile interface that’s designed to be used without sight.

It’s been designed in partnership with the Qualcomm Wireless Reach initiative and uses a standard Android smartphone powered by Qualcomm’s Snapdragon processor.

EE, formerly Everything Everywhere, has announced tariff details for its new 4G mobile phone service in the UK. It’s launching 4G in the UK on Tuesday 30th October in Bristol, Birmingham, Cardiff, Edinburgh, Leeds, Liverpool, London, Manchester, Sheffield, Glasgow and parts of Southampton. Coverage will expand to Belfast, Derby, Hull, Nottingham and Newcastle by Christmas.

The new service will be called 4GEE and promises average speeds of 8-12Mbps.

Orange, which was the world’s first mobile operator to launch HD voice calls, has made the first international end-to-end HD call between two mobile networks with different infrastructures.

Customers using compatible phones on the Orange networks in Moldova and Romania can now enjoy HD voice quality when making calls between the two countries.