Earlier this week, Tomi Ahonen announced the 2012 version of his comprehensive Phone Book Almanac. The Phone Book is a compliation of stats, fugures, and forecasts of the mobile industry and is wel regarded as one of the better public sources for this kind of content (you can find it elsewhere, but its in a lot of places or behind paywalls).

On the day Phone Book 2012 was announced, Ahonen took to Twitter (@TomiAhonen) and asked his followers to ask him one question of any stat that appears within the almanac. Here are a few that he tweeted:

• what is total number of sales of pure-touchscreen phones world wide – answer on page 53: 650M this year
• what is average percentage smartphone penetration in Middle East region? – answer on page 76: 45% migration
• I don’t have it broken down smartphone/dumbphone, but for all phones its on page 60, average replacement cycle now 21 months
• The Phone Book does tell us on page 99 that for the Advanced APAC region (includes Japan) most popular OS is Android
• what is average LatAm smartphone price – answer on page 36, is 276 US dollars
• whats the number of android handests in latam – answer on page 100: Android 35% of all smartphones LatAm
• page 159 tells us that Spanish mobile penetration rate currently is 122%
• what is global rate of 2nd-hand handsets in use – answer on page 42: 12% of all phones second hand

To purchase Phone Book 2012, visit the ebook’s website and follow the instructions.