I have the Zing Hotspot (which is also know by Netgear AirCard 771S).
When I first purchased my Pepwave Surf SOHO, I immediately upgraded the firmware to the latest version then available (v6.2.0 I believe).
When I tried to tether my Zing to the Pepwave Surf SOHO, it would not work. I watched and watched as the Zing connected, then disconnected after a few seconds. It would never maintain the connection.
I have no idea why, but I then decided to reinstall the firmware which originally came with the device (v6.1.2 build 1550). LO and BEHOLD, the Pepwave Surf SOHO has worked flawlessly ever since (10 months now).
If you loose power and reconnect the Zing Hotspot, it does take a few minutes. I sometimes wonder if some people would think it was not going to connect and would give up before it connected. BE PATIENT! It will connect (even though at the time it wasn’t on PEPWAVE’s list of compatible devices - I haven’t checked recently).
Then yesterday, I saw the email from PEPWAVE announcing that firmware updates would be FREE and a new firmware had been released (v6.2.1 build 1757)
I thought - “I think I will update to the latest firmware”. LOL. I was back to not being able to stay connected, just like the prior time I updated the firmware to v6.2.0
I reinstalled v6.1.2 build 1550 and everything is fine again.
Based upon my experience, the Pepwave SURF SOHO will work with the ZING hotspot, just make sure you use the RIGHT firmware.
P.S. If someone knows the advantages of using the newer firmware and how to get it to work with my SPRINT ZING HOTSPOT, please drop me a line.