False ANSWER

If you are using GREY routes (not legal) be ready to experience false Answer.

That means that i some way between caller and callee some "grey" provider answers the call but still plays ringing sounds to fake the call.

The call will be marked as ANSWERED but in reality nobody will answer.

To avoid this - talk with your provider or use "white" routes.

Betamax

This is very often happens with Betamax company group providers: http://backsla.sh/betamax

Voice Trading

http://www.voicetrading.com/

This provider supports 3 quality routes:

• Dialing number in E164 format: GREY
• Prefix 00: STANDART
• Prefix 000: PREMIUM

GREY plan has FALSE ANSWER problem.