the 'role play' involves them telling you to pretend you are actually doing the job you have applied for. they'd like to see how you will fit in when faced with difficulties and unpreparedness...
On the salary negotiation, just be modest,; but not overly modest o.k? try and find out how much the current staff doing the same job are paid and make your negotiations tailored around that.
By the way, when did you do ur first interview wuth them? (Airtel). I would like to know because i also did an interview with dem RECENTLY. I await your reply!
CIao!!!!!!!!!!!!!!!!!!