How do you keep the SIM slot on a Galway Tab A shut?

[PhilomenaButterfly]

It keeps popping open and the tab thinks the SIM's been removed. It's driving DS2 to distraction.

We've tried electrical tape.

has he got a case on it? one like this would keep it shut

That's brilliant, thanks! I've just ordered it in black, to be delivered tomorrow. So obvious, why didn't I think of that?