Well, the speeds will come from either your carrier/service provider and the data plan you have with them, or, if using WiFi, whatever speed that WiFi connection is getting.
In the case of the one through a data plan, there isn't much you can do. In regard to a WiFi connection, you can try rebooting the router/modem that you are connecting to (if it is your own). You can also contact your service provider/carrier if you aren't getting the speed you should be getting from the router/modem. Otherwise if it is public WiFi or something similar (where you don't have access to the modem/router) then there isn't much you can do there either.
Lastly, take note, the more apps you are running that access your data or WiFi connection, even if...