just minutes ago, an article about the new prepaid data bundle of UM appeared on
www.teltarif.ch. No real news but it clarifies some point of the offer.
Existing coustomers will be able to switch to the new data offer within the next weeks. The data-tariff is regarding this article definately NOT the same than UM +423. The data-sim will only register to the 60 networks that have data-roaming agreement. That might be the reason why the voice tariff is slightly higher.
They have mentioned twice that if you move over to the data-tariff, only will have coverage within the 60 data-roaming countries.
In my opinion the ICQ-SIM tariff is still the better choice with a daily setup fee instead of a session setup fee. Beside that I think this offer might not last too long with this high prices. Weeks ago they would had the best prices for data. Just recently three austria published their new data-roaming prices and they offer 0.28 Euro per MB in Switzerland (swisscom) and about the same for germany (e-plus and vodafone D2). You might argue that this are contract prices and not prepaid prices but that are the best rates I know at the moment...
BK
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Mobiles: iPhone 7+, iPhone 7, iPhone SE, Blackberry Priv, Honor 8, Lumia 950
Prepaid-SIM: 3 UK, Save Money Sim, Toggle Mobile UK, XX-Sim, Koko Mobile