How do I know if my sim somehow deactivated?

2 days ago I still received SMS. But since yesterday my network bar is zero. I thought my phone is faulty, but then I tried on 2 other phones, still the same, no network connection at all.

I thought it's just like what happens normally because usually when I'm inside my house the coverage became really weak. But this evening I went out to check it out and the network bar still zero...

Sim number : 8960010505 354045 12 5 (1) 64 A S
Validity 365 enabled last year, I believe there's still some months left.
Last topup was on June 2015.

Update :
When tried to dial any number : "Not registered on network"

On phone status menu :
Signal strength -97 dBm 8
Mobile network type > EDGE
Service state > Out of service

When tried manually select "MY MAXIS" under available network : "Your sim card does not allow a connection to this network"

And sometimes "MY MAXIS" not even appear under available network.

This post has been edited by andy0212: Aug 14 2015, 10:35 PM