From the Sunrise website - "
Deine Auflademöglichkeiten" = Your Top Up Options.
Using Google Translate on that page, you'll see there are loads of possibilities: -
" Private customers > Mobile subscriptions > prepaid > top-up
Click on the recharging of your choice and you see how easy you get to your credit. In addition we show you how to query your balance very easily from your phone.
Credit Card
Sunrise over bill
At ATMs
The Sunrise Center
On Postomat with the PostFinance Card
Abroad
With PostFinance account
Other top up options
Balance inquiry
Other top up options
Migros Shopping Center in about 600 stores and specialty markets (SportXX, Micasa, M-Electronics, Do it + Garden)
With more than 1,000 supermarkets, Coop, Coop Bau + Hobby markets, in all Interdiscount outlets or shops in the prepaid Coop
SBB ticket machines (touchscreen)
Postomats with the Postcard
Petrol stations, kiosks, post offices, various dealers
"
Can also top up at Denner too.