score:3
I tried it by myself and found one counter at the baggge claim floor. It is the same counter as the mobile Wi-Fi router rental, and they only sell China Unicom SIM card.
The SIM they provide is a bit expensive, with 4G/LTE, limited data and tethering being available. It expires in 30 days.
The price is the following, though they have other plans as well (e.g. 8GB, 2GB).
Upvote:5
Last time I was at Pudong Airport, China Unicom had a small stall in the baggage reclaim hall. Otherwise, there is also a China Unicom stall in the arrivals hall (T2).