Most RecentMost ViewedMost LikesActivating my SIM Begin your billing month and start using your shiny new plan Keeping your number Keep your old number and bring it over to SMARTY Activating a spare/bonus SIM or a SIM bought in a shop or other online supplier Have a SMARTY SIM at hand and want to activate it? Here's how to do it. When should I start using my SIM? Know when’s best to insert your new SMARTY SIM into your device for a smooth set up.