Temporary sim block

[Daniell_1818325]

How can I temporarily block my child's sim card, so for bad behaviour they can't use they're phone rather than take the phone away I can just pause it and then turn it back on like you can with the wifi

[Chalkychap]

Doesn't pause plan just stop the auto-renewal, @Daniell_1818325? 
I'm not sure the SMARTY billing system is sophisticated enough to allow an active plan to be paused during its validity period, and then be resumed later. 

Why not just remove their SMARTY SIM card from their phone? 

[JJP2RidesAgain]

Yes, that’s the obvious one, just remove the SIM card and keep it somewhere safe, but make a note of where “somewhere safe” actually is 

[MSF]

@Daniell_1818325 You won'r

t be able too pause it in the middle of a Smarty plan. As @Chalkychap says, you can stop the auto renewal and they then won't get a new plan. The only other way is by confiscating the phone altogether - see end result?