I had my phone stolen and want to know if I get a new sim I can keep the same number and whatsapp?

Hello TomLock_721485  Here is an article telling you the procedure:  https://help.smarty.co.uk/en/articles/1215834-what-to-do-if-your-sim-card-gets-lost-or-stolen

Sorry to hear that, Tom.

This is the Smarty community forum, populated by other Smarty users such as you and I.

In these circumstances, contact Smarty via webchat. They should be able to block the SIM in your stolen phone, thereby preserving your remaining minutes,text and data allowances, and also send you a new SIM, with your current number registered on it.