I compiled this info when choosing service provider for myself. Hopefully
you guys might be interested
Inbound Services
1st choice
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Net2Speech Inc, VoIP Service Provider
Net2Speech $26 unlimited - sometimes busy signal but very good
support Support Landline+cellphone
Excellent quality
outbound at 6.9c
2nd choice
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Click2Dial.net $35 unlimited - busy signal often
Landline only

They disconnects call after 1hour 15 mins. Sucks!!
3rd Choice
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Pakistantel - A clone from DIDx and only PC based

Looks complex
to configure .Need to go virtualphone to configure landline??
4th Choice
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Overpriced guys
Call Pakistan Direct - Unlimited Calls to Pakistan and Unlimited calls from Pakistan