i tried also with voicetrading +4477000 aren't accessible either by this betamax clone..
the cheapest i have find (and accessible) for these +4477000 numbers is rebtel at 0.12 eurocents/minute.

I noticed that both Voipgain and Voipyo (and probably the other Dellmont/Betamax brands, I did not check) now have dual-tiered pricing to UK mobiles - one for "main" and one for "others." Presumably this separates the expensive IOM numbers from the standard UK mobile numbers. My guess would be that with the dual-tier pricing, they no longer block certain IOM numbers as has been reported here.

The pricing was for Voipyo: €0.02 for "main" and €0.12 for "others", Voipgain: €.05 for "main" and €.12 for "others."

there is still block to +4477000 numbers even with the higher pricing

is working here now on voicetrading

r u sure? just retried to a 4477000 number..

Was working in oct for 1 week and now since 1 month no access anymore on voicetrading (all 3 routes no conncetion)

Sent another email asking if they blocked this service.

What about such services like skype, watsup, hangouts, callnspeack?
I used hangouts being abroad before bringing all the family together.