wcdma

Are WCDMA and CDMA different tech ? Many dual sim phones say GSM + WCDMA . Does this mean its a GSM and CDMA (reliance) compatible phone ? For eg, the Xiomi Redmini note , the new launch one on FlipKart states that it is GSM + WCDMA. Would this accept CDMA (reliance) sim ???

Guys,first of all please elaborate about the WCDMA technology. Are there any service providers in India,providing WCDMA sim card? What are its advantages/disadvantages over GSM?

Hi, >>I want to buy a CDMA phone in under 7K INR. Please suggest me a good one with touchscreen option. >>Also I want to ask if UMTS/WCDMA is same as CDMA 1X or not? Since WCDMA is available in Nokia asha 311, I'm not sure if I can use CDMA sim on this mobile. Please help.

Dimensions: 111.0 x 51.0 x 13.8 mm Weight: 122 g Display: 3.2" touch screen 640x360 resolution, 16.7 million display (16:9 aspect ratio) Dedicated Media Bar touch key for access to music, gallery, share online, Video Centre and web browser Physical keys for application launch (menu key)...

plz tell me what is wcdma and how can i use it. also Tell me what is push to talk function and how can i use it.