callback service comparable to callbackworld?

[petkow]

Originally Posted by JPSmith

Old thread, same question......anyone know of a callback service offering a good rate from UK mobile numbers (in my case, an eKit sim) to the U.S.?

If you can do the trigger via GPRS data, currently the cheapest by far is one of the Betamax brands VoipGain | For the cheapest international calls. You need to first open an account there (by downloading the softphone on to a PC) and then you need to download the Java client onto your phone from http://gsm.voipbuster.com and then put in your voipgain username and password into this client. You setup calls callback calls through the client, and it will require to transmit a few bytes of data each time. There is also an SMS way of doing this but I haven't explored that option yet.

Using Voipgain, the callback rates for this from a +447 to the USA work out at an incredible 3.1 US cents per minute! Plus there is a 5c call setup charge.

Worked out as:
UK Mobile 2c/min (Eurocent and excluding tax)
USA 0c/min
(From VoipGain | cheapest calling rates)

Don't place your bets on that 2c rate to UK Mobiles (which includes the IOM ones used by Ekit) lasting for too long. On their other brands it is around 5c/min, but that is still cheap. USA is generally 'free' (provided you have topped something up in the last 90 or 120 days depending on the brand in use).

For a full comparison of all Betamax brands see: backsla.sh/betamax

[inquisitor]

Originally Posted by petkow

There is also an SMS way of doing this but I haven't explored that option yet.

Really? I used SMS-triggered callback until sommer 2007 when Betamax ceased that feature at least for justvoip and poivy. But I remember a Polish guy on the voipbuster forum, who had built a public SMS-callback-gateway afterwards. Maybe his service is still online, but I wouldn't share my credentials with an anonymous individual.
However IP-based triggering is probably cheaper than SMS, if you have a SIM with reasonable data roaming tariffs. With moipe.com, a data roaming discounter who will launch soon, a callback request would cost € 0.09 (for 10KB), while SMS are always way more expensive while roaming.