Vi — Post call notification

I ported my number from Airtel to vodafone. I use a prepaid sim in my phone. I want the post call notification to be disable(by that i mean, the message that pops up after my call sayin "your last call charges was xx.xx and balance is yy.yy".
Also as they come on screen the network goes to 3G

I find this irritating and i think the customer should have the freedom to decide if he wants that notification or not.