No, it's not.
This is why I said I am using a dual SIM phone: Toggle for Toggle countries (where I am often) and Travelsim for worldwide coverage.
And both SIMs are used with iphone/android callback.
No, Austria is free (0.00£) to receive calls with Toggle.
So as I use callback I call 50+ countries landlines for free & cheapest worldwide mobile rates from Austria using the Toggle SIM.
The same goes for the 20 countries where Toggle has free incoming.
Then I pay 0.19£ per call (no minute charge) in the 16 other countries where Toggle charges 0.19£ per incoming call, or 0.09£/min with the Travelsim.
All of the other countries where it is more expensive, are more expensive with Piranha also; this means Piranha is of absolutely no use to me.
Again, here Toggle charges 0.19£ per incoming call (no minute charge), this means I call 50+ countries landlines for free and the cheapest possible rates to Mobiles worldwide with betamax callback.
Or I can use the Travelsim: 0.09£/min callback.
Piranha is more expensive even with callback because they charge so much for incoming calls.
The only good point for Piranha is the cheaper data, but then if you really want to use data properly 0.20£/Mb is again too expensive. The only viable option is a data plan and this means a local SIM (or perhaps the new T-Mobile, AT&T, Vodafone, etc... world data plans. Anyway, Piranha is a gain out of the window).
With Toggle: 0.19£ per incoming call (no minute charge) + callback for local call to Thailand = free (no per minute charge) to Thai Landlines & Mobiles but 0.19£ one time charge to setup the incoming call on Toggle.
Or again: 0.09£/min to call Thailand with callback on Travelsim.
Piranha is 0.33£/min? -> Out of the window.
This is what I said:
"France 0.04£, Germany 0.05£ for incoming calls. Germany is even more expensive with Piranha (0.14£ Mobile)."
0.14£ to call German mobile phones with Piranha which is more expensive.
Many Telecom providers in Europe are offering plans with free calling to EU : the +372 Estonian number is an EU call. So, free to call if you have such a plan. (example, contacts in Switzerland using Swisscom call me for free on the +372).
Otherwise, today everyone has internet at home and so everyone tends to be using SIP calling for telephone calls (even the telecom providers are offering home internet + phone bundles and these phones connected to internet routers are SIP calls).
This means, today people are using SIP phones at home. So, they add a cheap SIP provider in their phone settings and it costs them 0.09£ to call me on the Travelsim (and they also have all of the other advantages : 50+ countries free landline calls and cheapest mobile calls worldwide).
Those who don't have internet at home or those who don't have an EU calling plan can call a local landline number.
And those who don't want to do anything to call cheaper and prefer to call with an expensive provider, that's their choice.