How slow?
What sort of results do a few speed tests give you?
Where are you located?
Do you know anybody else in the area on 48?
What sort of speeds do they get?
Are you sure that your APN settings are configured correctly?
Text "APN" to 50048 and follow the instructions here to do this:
If that doesn't help then you'll probably have to contact 48 support for further assistance.
See the links in my signature below.
