Q:

Is there a way to access wifi in Zurich airport without a phone service?

I am traveling through Zurich and have a phone without any roaming there; I'm planning on picking up a SIM once I get to my final destination. Last time I was there, I couldn't access the airport wifi because it required a code sent via SMS.  
In the event I need to contact someone or coordinate about flight delays, is there some alternate way to get wifi access?

A:

This link to Zürich Airport handles your problem. 

How to log on

Select the ZurichAirport WLAN network 
Launch the browser (e.g.: Internet Explorer, Firefox, Safari, …) on the device 
A connection to the login page is created automatically
Select „Register“
After registering, a code will be sent via text message
Enter the code in the registration interface and click „Login“ (the code will be saved for twelve months)

No mobile phone or problems with text message reception?
For an access code you can use boarding pass scanners at the following locations:

Service Center (Airport Center, Level 1)
Information (Airside Center, Level 1)
Airside Center, Level 1 beim Transit Hotel
Switzerlandinfo, Arrival 2
Gates E, Level 2 next to Starbucks
Gates E, Level 2 next to Alpenblick Bar
Gates A, opposite to Starbucks (A63)

A:

Zurich airport offers also mobile wifi hotspots with unlimited high speed data.
I think they just started with that rental service. It's not a free service though. But sounds quite convenient.
https://www.zurich-airport.com/passengers-and-visitors/airport-services-en/information-desks

