This worked some years ago (2011) then stopped. It resurfaced some months ago and stopped once again. It may come back again but I don't know when or if it would.
1. APN: mms
direct. required no tweaks
2. APN: mms
Port: 8080 or 80
Since then I tried to get it to work again. The last time I tried (don't remember when) I could open mtnplay.com.gh with option 2 but nothing else worked.
Maybe there's still hope there......