which Netgear modem is compatible with MTNL triband coz the MTNL triband head for my area told me to either go for D-Link DSL502t of which production has been stopped or to go for netgear.he did not know the exact model no.he said that u should not go for GLB502t as many users are having problems.also, im in mumbai so please tell me where i can get it and at what cost.