finally made up my mind, i was about to buy HTC one then this news made me wait
"HTC GSM + CDMA DUal HTC One will get Launched in India by July End - Confirmed from Reliable Sources" this handset is already launched in china and doing pretty well. on top of that it supports SD card expansion.
HTC One
now i will buy a mint S3 for 18k, use it for a couple of month and then go for the dual sim HTC one.
Unicom version: WCDMA 850/1900/2100, HSDPA 21,
HSUPA 5.76 + GSM / GPRS / EDGE: 850/900/1800/1900
Telecom version: CDMA 800/1900, GSM / GPRS / EDGE 850/900/1800 / 1900 (international roaming)
UMTS 900/2100 (international roaming), HSDPA 14.4
(* Telecom Edition supports seamless global roaming double G dual standby dual pass, international roaming, the main card will automatically switch to GSM / WCDMA network , dual card standby at the same also, uninterrupted communication truly global seamless roaming)
Mobile: TD-SCDMA/TD-HSDPA 1880-1920/2010-2025MHz
WCDMA / HSDPA / HSUPA 850/1900/2100 MHz
EDGE / GPRS / GSM 850/900/1800/1900MHz SIM 2: GSM / GPRS / EDGE: 850/900/1800/1900