Beginners Guide to TikTok for Search - Rachel Pearson - We are Tilt __ Bright...
1st Billion Phones
1. 10 years to sell the first billion mobiles 3 years to sell the second billion mobiles 3 rd billion mobiles sold in 2007 alone 3 billion more will be sold by 2010 It took 50 years for the landline telephone to be adopted