My experience with Onesimcard.

[OneSimCard]

Originally Posted by fsotirop

now free incoming calls in bulgaria but outgoing calls in Bulgaria are now more expensive...

Outgoing call rates from Bulgaria have not changed:

Incoming calls to EU number: free
Incoming calls to US or other extra number: 20c/min
Outgoing calls: 75c/min
Outgoing calls to another OneSimCard user: 25c/min

http://www.onesimcard.com/rates