Phones that support HSDPA do not support CDMA 20

HSDPA (High Speed Downlink Packages Access) technology is the most important technology to improve the high-speed downlink data transmission rate of the WCDMA network, which is proposed by 3GPP in the R5 protocol in order to meet the asymmetric needs of uplink and downlink data services. Greatly improve the downlink data service rate of users (the theoretical maximum value is reachable, this technology is an important technology to improve the downlink capacity and data service rate in the construction of WCDMA network. So WCDMA is fully supported

It's too professional, HSDPA is, WCDMA is 3G, HSDPA is based on WCDMA, so supporting HSDPA must support WCDMA, but the premise is that what you are referring to is not China Mobile's HSDPA, it must be China Unicom's, because China Mobile is self-developed, not the internationally accepted HSDPA

It supports WCDMA, but not CDMA (i.e. 1x).

Hello. 1.Mobile phone resolution refers to the precision that can be displayed on the mobile phone screen, and the simple understanding is how many pixels there are on the mobile phone.

You can take a closer look at the computer screen, TV screen, mobile phone screen, can you see a lot of very small and very small grids? That is the pixel, the more pixels (resolution), the more delicate the display, the less grainy, on the contrary, rough, grainy. The resolution of our human eye is so high that it is not grainy.

The iPhone's screen is called a "retina screen", and it is said that it does not feel grainy. At present, the mainstream resolution of smart touch screen mobile phone screens (inches, inches, inches) is 480*800 or 480*854 (Motorola ME525, Sony Ericsson MT15i, etc.), and even 960*540 (Motorola ME860, etc.) and 960*640 (iPhone4) resolutions.

It is a 3G communication standard from Europe and Japan, and it is also the most widely used 3G communication system in the world, which can provide a theoretical maximum of 384Kbps to 2Mbps ** rate, and China Unicom in China currently adopts this 3G standard. HSDPA is the enhancement of WCDMA, commonly known as, HSDPA will increase the theoretical maximum speed of WCDMA to but most HSDPA terminals only support or, all of Unicom's current 3G networks have been upgraded to HSDPA, according to my observation, the average speed can be maintained above 200KB. Let's talk about the conversion unit problem, 8Mbps = 1Mbps , 8Kbps = 1Kb S, the broadband bandwidth and 3G bandwidth advertised by operators are Mbps and Kbps, and the **speed units we usually use are Mbps and Kb S, understand clearly, don't be fooled by operators.

I hope you're happy with me, thank you!