V o IP ), ▁that ▁compet es ▁with ▁other ▁main stream ▁prov iders ▁in ▁the ▁field , ▁including ▁Sk ype ▁( Microsoft ). ▁ ▁Based ▁on ▁the ▁same ▁A AC - LD ▁audio ▁protocol , ▁the ▁service ▁provides ▁high - quality ▁audio . ▁The ▁iOS ▁ 7 ▁bet as ▁limited ▁Face Time ▁Audio ▁to ▁calls ▁placed ▁on ▁a ▁Wi - Fi ▁network ▁( the ▁same ▁original ▁limitation ▁of ▁the ▁video ▁version ▁of ▁Face Time ), ▁but ▁the ▁final ▁release ▁has ▁removed ▁that ▁restriction ▁to ▁allow ▁it ▁to ▁work ▁over ▁ 3 G ▁and ▁L TE ▁data ▁connections , ▁as ▁is ▁the ▁case ▁with ▁most ▁carri ers ▁and ▁plans ▁with ▁regard ▁to ▁Face Time ▁with ▁video . ▁Like ▁the ▁video ▁version , ▁Face Time ▁Audio ▁is ▁currently ▁only ▁available ▁between ▁Apple ▁devices . ▁The ▁feature ▁is ▁not ▁available ▁to ▁run ▁on ▁the ▁i Pod ▁Touch ▁ 4 th ▁generation ▁as ▁the ▁device ▁does ▁not ▁support ▁iOS ▁ 7 ▁or ▁later . ▁Face Time ▁streaming ▁over ▁cell ular ▁data ▁is ▁un available ▁for ▁the ▁iPhone ▁ 4 ▁and ▁the ▁i Pad ▁ 2 . ▁ ▁Limited ▁avail ability ▁ ▁By ▁country ▁, ▁Face Time ▁is ▁not ▁enabled ▁on ▁devices ▁bought ▁in ▁the ▁United ▁Arab ▁Em ir ates ▁possibly ▁due ▁to ▁reg ulations ▁in ▁this ▁country ▁that ▁restrict ▁IP - based ▁communic ations . ▁In ▁addition , ▁on ▁devices ▁bought ▁in ▁China ▁only ▁Face Time ▁Audio ▁is ▁disabled , ▁while ▁Face Time ▁Video ▁is ▁available . ▁Dev ices ▁bought ▁outside ▁these ▁countries ▁support ▁both ▁video ▁and