No signal in majority of place my THREE SIM had signal.
I have an unlimited calls, 50GB data, roaming 12GB Line, and my line was suspended because I used 83minutes of calls in the entire month, and it was deemed as Excessive and then they utilised their T&C section 8 to identify they have the right to play games with customers as a SIM from Smarty is decoration and not to be used (if it ever had signal)