Having got my new China Unicom WCDMA 3G number, I was somewhat confused that (a) data service worked through my China Mobile settings (b) it didn’t work using the settings Unicom customer service provided, and (c) I found yet another set of settings that can be used.
Whilst I still don’t know why the above is true, I found the following:
1) Use China Mobile settings (APN: CMNET) for GPRS / 3G Data with no proxy works fine. MMS should be received using WAP profile (APN: CMWAP , MMSC: http://mmsc.monternet.com , Gateway or Proxy: 10.0.0.172. Port 80 for HTTP, port 9201 for WAP)
I don’t know if this is just compatibility, or a problem with China Mobile’s network.
2) The settings Unicom customer service now provide will only work through a proxy.
GPRS APN: 3gwap
WAP APN: 3gnet
- for both must set proxy through 10.0.0.172 . These settings provide support for web (HTTP) traffic only.
3) Older data suggests to use:
GPRS APN: uninet
WAP APN: uniwap
MMSC: mmsc.myuni.com.cn
- I use this and it works. No proxy needed for GPRS ; but use 10.0.0.172 (as above) for MMS. Works across all protocols (MSN, FTP etc…) unlike 3G settings.
Therefore if you have a China Unicom 3G card and have been given the new settings, don’t bother. It’s just more complicated, and using 3gwap non-HTTP based services will not work.
Note: I’ve subsequently discovered this site claiming that for certain applications like Mobile Television you must use the 3G settings. I haven’t tested.