My Dear Friends, 
  Planning to buy HTC one Dual SIM 802D [CDMA / GSM version], but have few doubts & please asking your help to clarify. 
- Does this phone support both CDMA & GSM SIM cards in SIM1 slot, reason being I will be travelling outside india so asking to confirm, So I can use 3G in non CDMA circles. 
- How about using chat applications like Whatsapp & Voice apps like Viber on Reliance CDMA network, did any body face any problem.  
Thank You in advance.