The first-72-hours checklist
Three things unlock everything else. Do them in this order.
1 · Register your address (within 24 hours, yes, really)
Every foreigner's address must be registered with the police. Hotels do it automatically at check-in, just hand over your passport. Staying in an apartment or with a friend? You must register within 24 hours, Shanghai has an online self-declaration system (about 5 minutes), or go to the local police station. Full details in Rules & Paperwork.
2 · Get a SIM card
- Easiest: official carrier counters in the arrivals halls at Pudong and Hongqiao airports, 5–20 minutes, no appointment, English usually available.
- In the city: any big China Mobile / Unicom / Telecom store (small neighbourhood branches often speak only Chinese).
- Before you fly: eSIM platforms let you register your passport online and land with data already working.
- Prepaid, no-contract plans exist (e.g. 30-day unlimited-style around ¥195). Cheap student plans (~¥29/month) usually carry a 12-month contract, skip those for short stays.
3 · Set up mobile payment
China is nearly cashless, set up Alipay or WeChat Pay before you need it. Full walkthrough in Money & Payments.