dual sim phone

I am looking for a dual sim mobile phone (GSM+GSM) preferably Nokia. The phone should have the option to activate/deactivate the sims individually. Also, it shouldn't be touch screen and should have key pad. The phone should also have good voice clarity. Thank you all in advance.

I wanna buy a dual-sim (dual standby and dual active) business smart phone that should have 1.Unlimited contacts 2.Battery that delivers plenty of talk time and standby 3.Fast & Friendly UI My budget is under 25k. My choice is to take HTC Desire V. The thing that makes me feel awkward...