Hi, As per RIM, thier official provider in India is Barth cell net or something like that name. Airtel is not a service provider for BB's in first place, hence RIM handheld wont pick up signals nor will the network (Airtel) will allow it pass the message to your BES. So if u ask me its better for u to contact Bharthi cellular Network ops and findout a best way to intergrate this.if its costing too much then drop the idea of giving RIM to ur user.