After lots of research .Here's my list of tested earphones on the Moto G
1) Samsung EHS44ASSBECINU - Answer button doesnt work' , Mic works ; Ok sound on Motog .Works better on samsung phones as impedence matching is better
2) Nokia WH-205 - Answer button doesnt work .Haven't tested mic. Very good sound quality . I would have picked this up had the answer button worked.
3) Sony MH 750 - Everything works and sound quality is excellent . Asymmetric wires. Bang for buck . Buds are delicate unlike Samsung's . No flat cable .Handle with care .
4) Universal earphone - Chinese make . Everything works and its got a switch for CTIA & OMTP modes .Sound quality is basic.