Flash messages

[spiff]

How can get rid of this flash message? I'm on prepaid and it comes up when I make a call.

I've tried talking to MTN direct, but they can't help and just tell me to call 135, which is just as useless.

 

[HitmanV]

How can get rid of this flash message? I'm on prepaid and it comes up when I make a call.

I've tried talking to MTN direct, but they can't help and just tell me to call 135, which is just as useless.

I'm also on prepaid and I get this crap with every call.
Just now I got this one and did not even touch my phone. It was just lying on my desk and the screen lit up and showed this.

 

[Rickster]

How can get rid of this flash message? I'm on prepaid and it comes up when I make a call.

I've tried talking to MTN direct, but they can't help and just tell me to call 135, which is just as useless.

*136*4*4#

To change to Call per Second.