No, it is not possible b'coz you need hardware for hspda.

An update is only limited to software and not hardware.

However many websites say that Nokia 5233 has hspda and many say that is does not support.

Thank You

The U830 is a third generation fliptop phone with HSPDA support.

-- YES, Monilicity and T-Mobile are same 1700 and 2100Mhz.

No, you can't, Mobilicity uses HSPDA AWS (iPhone doesn't support AWS as of right now).

The only reason we can use an iPhone on T-Mobile is if we turn off 3G (falls back onto 2G). Mobilicity being a brand new provider, they didn't bother with 2G and simply went with 3G.

Until Apple comes out with an AWS friendly iPhone you are out of luck. (This would work for Wind & Mobilicity).

AT&T's Z331 was tailor made for use on its lightning-fast HSPDA 3G network rated at 3.6 Mbps. Speed makes all the things a smartphone exists to do a pleasure. Email, downloading large music or video files are a breeze when using the Z331. Sending and receiving text and picture messages is nearly effortless, as well as viewing web pages. With the AT&T 3G network, all of this is possible while you make a voice call too. Add the standard GPS to provide navigation and Bluetooth (V2.0) connectivity, and you can even add a wireless headset and a variety of hands-free car kits as appealing and useful options.