150pcs of A3233-q48 are fitted in a 1TH/s Avalon Miner.
See
https://bitcointalk.org/index.php?topic=523309.0Cost per unit is ca 0.1 USD
Consumption is about 5 watts
So it seems that if each user/miner would be equipped with one chip, the number of users/miners necessary to achieve the same hash power as of today would be 5000000 TH/s * 150 = 750 millions.
Do remember to factor in: the additional cost of miniaturizing the chips such that the performance of the phone is not affected, the heat output is eliminated, every company in the world is willing to redesign their board. Honestly, if you were to launch a phone with this feature, the only people that may even be interested (not necessarily buying) in it are hardcore Bitcoin enthusiast. It simply doesn't make sense for manufacturers to do this especially if they don't gain anything, neither do most people that is using the phone.
That is much less than the number of facebook users !
Nice. Divide that by 750 and that might be 1/2 of the Bitcoin users.
Yeah I forgot this: In comparison, a phone's battery is about 3000mAH.