Video summary

7 China eSIM Mistakes That Kill Your Internet (Fix Before You Fly)

Main summary

Key takeaways

Technology

Summary of key tech concepts, mistakes, and fixes for China eSIMs

The video explains that “China eSIM not working” issues are usually caused by predictable setup/planning mistakes related to activation timing, device settings, roaming toggles, line selection, firewall expectations, and hotspot limits.

1) Activate too early (plan countdown starts on activation)

  • Many eSIM plans start counting from activation time, not from when you arrive in China.
  • Key terms:
    • Installation = adding the eSIM profile to the phone.
    • Activation = turning it on and connecting to the supported network.
  • Fix: Install ahead of time, but activate right before the flight / during travel / on landing, based on the plan.

2) Deleting the eSIM profile

  • Some eSIMs can only be installed once.
  • Fix: If you need more time/data, don’t delete. Use top-ups or extensions from the same provider instead.

3) Roaming not enabled for the eSIM line

  • If the eSIM isn’t connecting, a common cause is forgetting to enable data roaming for that eSIM.
  • Fix: Toggle data roaming ON for the eSIM data line (the roaming is handled within the eSIM provider’s setup, not your home SIM).

4) Wrong SIM/line selected for mobile data (dual SIM phones)

  • On dual SIM phones, the device may keep using home SIM for data, leaving the eSIM “inactive.”
  • Fix:
    • Set mobile data to use the eSIM line
    • Keep data roaming OFF on the home SIM to avoid unexpected charges
    • Use home SIM for calls/SMS while eSIM handles data

5) Expecting a Chinese phone number / SMS codes

Most China travel eSIMs are data-only:

  • No Chinese number
  • No receipt of SMS verification codes

Fix:

  • Keep your home SIM active for SMS (for OTPs)
  • Or get a local Chinese SIM if you truly need a Chinese number

Note: Using a local Chinese SIM for data “roaming” may not bypass the Great Firewall due to restrictions on access to certain sites.

6) Assuming any eSIM bypasses the Great Firewall

  • Having an eSIM doesn’t guarantee access to blocked services (Google/YouTube/Instagram/Facebook, etc.).

Fix:

  • Choose an eSIM provider located outside mainland China
  • Have a VPN ready for extra insurance

7) Hotspot/tethering assumptions (plans may throttle or limit sharing)

  • Some eSIM plans restrict hotspot usage or throttle it severely.
  • Result: Laptop browsing/uploading/Zoom becomes very slow after an initial small allowance.

Fix: Before buying, verify the plan explicitly supports hotspot (not just “unlimited data”).

Guides / references mentioned

  • The creator references a prior video: “best eSIM for China as it covers all of the basics … in 2026” (used to find eSIMs that can work reliably for the firewall).
  • Mentions downloading a free China pre-trip guide (link in description).
  • Mentions a separate VPN video for setup assistance.

Main speakers / sources

  • Primary source: The YouTube channel host (“Project Al” mentioned at the end of the video) discussing China eSIM troubleshooting.

Original video