10210 is the number. If you are on any of the uncapped all-in-one packages from MWEB, then you're screwed, like me.
MWEB refuse to upgrade just the line to 10mbps (so that I can use a capped account from another ISP to utilize the full 10mbps speed), and leave the data package at 4mbps uncapped, even though the upgrade to 10mbps costs them nothing, except a happy customer. They also refuse to upgrade the line to 10mbps and move me onto a capped package.
So if you migrated your ADSL line to MWEB, then the only way to get 10mbps, is to upgrade to a 10mbps uncapped all-in-one account at a mind-blowing ridiculous price of R2359 per month. Either that or cancel your MWEB account, which requires a 1 calendar month notice. I sent mines through yesterday. Will only be able to appreciate the speed of 10mbps from the 1 June onwards, even though Telkom says I can have it.
Bottom line: DON'T MIGRATE YOUR ADSL LINE.