Just got back from a trip to China, and this SIM card was a lifesaver! The 5GB of high-speed 5G/4G data lasted me the entire 15 days, and I loved that it worked seamlessly in both Mainland China and Macau. No activation needed—just popped it into my unlocked iPhone, and I was online instantly.

The best part? Uncensored access to Google, Facebook, and WhatsApp. As someone who relies on these apps daily, this was a game-changer compared to local SIMs that block them. The free 100MB test data in the US was also handy to confirm everything worked before my flight.

However, the included SIM eject tool was useless—I ended up using a paperclip like other reviewers mentioned. Also, while my 15-day card performed flawlessly, I noticed some complaints about the 30-day versions disconnecting prematurely. Stick with the 15-day option for reliability.

Pro tip: Make sure your phone is unlocked and roaming is enabled before departure. Had zero issues in urban areas, though remote spots had weaker signals. For $20-ish, this beats airport SIM prices by miles!