bro using k3 ... my piece is working gr8 ... no issues... and that SAR is actually a psychological kind of stuff that wouldnt gonna harm you just like in hours or weeks or months so you would call for up like headaches, thats just hoax...its really harmful but would take atleast 10 or more years to really show up, whos going to hold on a phone for so long and I had checked up a lot on internet and found that its actually a complete set of connectivities active at once thats usually rare... and all of it so called bossy iPhone 6 too have somewhat similar SAR ratings... so dont fret about it... most of the time companies show just the SAR value of calling or the lesser SAR ratings as comparable b/w US and EU values... If you are using only 2G call, then the SAR value will be only 0.61 W/Kg. Go checkout some videos on youtube or makeup ur own plan ... its great performer... but if you really do care about those meaningless cons which most of the other phones out there have too... then spend few more bucks nd opt of ASUS Zenfone 2 or Moto G3 (having minnimum two grade earlier CPU nd GPU but nevermind it would perform Great)...