Simcity Buildit 1100.7 Error -

Perform these solutions in order. Do not skip steps. Back up your city by ensuring you are logged into Facebook/Game Center/Google Play before the error occurred. If you cannot access the game at all, proceed anyway—most fixes do not require in-game access.

If none of the above work, a clean reinstall is required. Only do this if you are 100% sure your city is backed up to Facebook, Google Play, or Apple Game Center. If you were a guest player, you will lose your city.

If you’ve tried all 6 steps and still see error 1100.7 for more than 24 hours, reach out:

Screenshot the error and list what you’ve tried — it speeds up their reply. Simcity Buildit 1100.7 Error

Android:
Settings → Apps → SimCity BuildIt → Storage → Clear Cache (do NOT clear data unless necessary).

iOS:
Settings → General → iPhone Storage → SimCity BuildIt → Offload App → Reinstall.

Note: Clearing data might require re-downloading game assets, but your city progress is safe if linked to a cloud account. Perform these solutions in order

Encountering an error code in SimCity BuildIt can be frustrating, especially when you’re in the middle of expanding your city or participating in a Contest of Mayors. One error that players occasionally report is Error 1100.7. Here’s a clear breakdown of what causes it and step-by-step solutions to resolve it.

Unlike generic "connection failed" errors, the 1100.7 code is specific to SimCity BuildIt’s client-server authentication handshake. When you launch the game, your device sends a "handshake packet" to EA’s servers. Error 1100.7 occurs when the server receives that packet but finds it malformed, expired, or conflicting with a previously saved state.

In plain English: Your phone and the EA server are speaking different versions of the same language, or your local save file has a timestamp mismatch with the cloud save. Screenshot the error and list what you’ve tried

Common symptoms include:

Before touching your device, see if the problem is on their end.
👉 Go to EA’s official help Twitter or check Downdetector for SimCity BuildIt.

If servers are down, all you can do is wait. Don’t reinstall yet.