I managed to test call diverts with das-abo, and the result is the best possible:
It is possible to divert calls to all numbers, also abroad, and it's not charged separately! A divert is charged and listed as if you effected a normal call to this number. So when included in the flat rate this is equally included. What this means:
When roaming, instead of using the roaming-rates offered by das-abo, you just divert your number to a local number of where you happen to be. As such, receiving calls on your Swiss number is suddenly FREE (as opposed to das-abo roaming rates). How to combine this:
How to actually use it:
- You can get local SIM-cards of wherever you are and divert your Swiss number directly to those. This way you can receive calls on your Swiss number, free of charge, without giving anyone a different number. No one would even notice or know.
- A German www.alditalk.de prepaid card would provide this option for all of the EU, since they have free incoming throughout the EU. So when out-of-Switzerland you divert "all calls" to your German Aldi-number, and never have to worry about getting too many cards. Remaining problem: Data. While Aldi does offer one data-package for the rest of the EU, it's not great (€4.99 for 150MB valid for 7 days). However, if this suffices, this might be the best and easiest option.
- For USA/Australia/India (and some other countries...), combine das-abo with www.togglemobile.co.uk
- Let's say you have your German www.alditalk.de number +491771234567
- on your das-abo, enter **21*+491771234567# (call button)
- all calls from you Swiss das-abo number are now diverted to your German number. This is included in das-abo's flat fee and hence doesn't cost anything
- when someone calls your Swiss number, your German number will ring instead, throughout the EU free of charge (as explained above)
- when back to Switzerland, just enter ##21# - the divert is cancelled and all calls go directly to your Swiss phone as before
- if you're not sure what the story is, enter *#21#, and the phone will display your current divert status
It´s not complicated at all to get used to this, and it can and will save you a lot!
PS - there are a lot more divert-strategies, both automating things and also for other countries such as South-East-Asia where no flatrates apply. But I won't dig into them if no-one even uses the simplest version as per above.