Change my long distance phone service provider to poivY

I used Voipstunt as my long distance phone service provider almost two years. It gave good quality phone connection.
Now I change to poivY. A new voip provider name, but actually same company as voipstunt.
The most important reason is that China main land is the free call country in poivY.
All setting is similar to voipstunt. Let me describe how to use it.
1) Sign up the account.
2) Buy credit about US$15 to top up the account.
3) Call free in 90 Freedays to free countries or area.
Including Canada, Chian, USA, UK, etc. For full list please click here.
4) Max 300 minutes per week of free calls.
5) After 90 days, the normal rate apply.
Say, China USD0.027/min, USA USD0.02/min.
The Setting of SIP device shown as below:

SIP port : 5060
Registrar : sip.poivy.com
Proxy server : sip.poivy.com
Outbound proxy server : leave empty
Account name : your PoivY username
Password : your PoivY password
Display name/number : your PoivY username or voipnumber
Stunserver (option) : stun.poivy.com

You can still download the softphone to use through your desktop.

When I buy credit, I can not use the same Paypal account which I used in my Voipstunt.
I tried to use same paypal, but it automaticly refund to me.
It said: This transaction is refunded because we do not allow using the same paypal account on more than one user-account.
That means Voipstunt and poivY use same accounting database.
The company running Voipstund and poivY or others is Betamax GmbH & Co.KG.