If your SMART users and looking on how to activate your mobile phone GPRS, MMS, and 3G. You can configure this SMART 3G setting via web or through text. Just follow the detailed link below on how to activate the setting so you will use your mobile 3G capability.
Aside from that this is totally FREE no hidden charges just maintain P1 balance to your load.
How to Configure SMART MMS, GPRS, or 3G Settings Via Web and Mobile - Follow here
How to set-up SMART GPRS and MMS Manual Settings - Follow here