Truphone,once a great Free Mobile VOIP Service lost the ground when they stopped offering free mobile voip calls to 40 countries. However they are now back in the VOIP market with a flat monthly billing Unlimited Calling Package which included 40 countries around the world including India,Pakistan, bangladesh and many more.
If you don't know what TruPhone is, its basically a Mobile VOIP Service that means you need to have a Mobile which supports Wifi and SIP. Truphone also works over GPRS, but the call quality could be poor due to lack of bandwidth. Most latest Mobile Phones supports SIP and Wifi, mostly all N and E series Nokia phones do support SIP and VOIP Calling.
TruPhone's TruUnlimited Landline package starts at $17, however it does not include all the countries and calls are restricted to Landlines only. Don't worry, They also have a TruUnlimited Mobile package which offers unlimited calls to landlines + Mobiles in all the countries including India and most other asian countries.
You have two options to choose from:
TruUnlimited Landlines ($17)
Unlimited calls to landlines* in 38 countries worldwide. Call any time of the day, any day of the week. No long-term contract. Also includes unlimited calls to mobiles in 9 countries including the USA and China as a bonus!
TruUnlimited Mobiles ($40)
Along with unlimited calls to landlines* this plan includes unlimited calls to mobiles* in 69 countries, including the USA, the UK, Germany and China. Call any time of the day, any day of the week. No long-term contract.
Truphone also has an iphone application which will enable international mobile calls over wifi. Cool feature.