Latest Betamax group VOIP call rate of Bangladesh, India and Pakistan as of 21.03.2018

Bangladesh
Landline (0,5 euro cent) voipcheap.com
Mobile (1,8 euro cent) cheapvoip.com, intervoip.com, voipbuster.com and voipcheap.co.uk

India
Landline & mobile (0,6 euro cent) intervoip.com

Pakistan
Landline & mobile (5 euro cent) voipstunt.com

All have their Android, windows mobile and apple iOS version of softphones so no problem of calling from your smartphone is you are connected with internet.