It was only a couple of weeks ago that Facebook announced there were 102 million users accessing the site through the iphone app, along with 57 m on BlackBerry and nearly 12 m on Android. The social networking site has now changed it’s mind, and said that the figure is closer to 44 million. Or 66 million depending on what you read! The 44 m was quoted by FB to Engadget, and the 66 m is quoted on Facebook’s own page. Confused? It looks like everyone is.

A company engineer recently blogged that there were 150 million people accessing the site through their mobile phones, but it looks like that figure will also have to be revised down. Which ever way you look at it, it is fair to say that FB has many mobile users, but the exact figure is now a very cloudy one. It highlights one of the many problems with mobile marketing – getting acurate data is difficult, or near impossible.