I used Dolphin’s International roaming services(I doubt any WORKING PROFESSIONAL has used it so far for Business trips) but the coverage was excellent in EUROPE(FR: Orange/Bouygyes/SFR) and in THAILAND(DTAC). No surprises with billing. Very clear billing and conforming to the tarif announced. They have large number of partners.
They could definitely do better in this area if they sell a package bundled MTNL landline+ cell phones to corporates. They charge very less security deposit(4000 INR) and low rental for intl roaming(INR 60 / month).
The call center too is efficient enough. They should improve distribution and sales points. Every MTNL exchange should be able to sell and treat ALL kind of queries and services be it landline/ mobile / billing/ value added services – roaming etc. Telephone exchange staff could be better if trained, educated correctly on the products they sell.
BRAVO MTNL! Sahi hai!