When logged in to Origin, account/town has been reset to level 1
Try accessing the game from a different device.
When accessing the game from a different device, if you get an error message that says "Your other device didnt save your Springfield. Please sign into that device before playing. then see this post.
Try force-closing the game app from the multitasking menu and then reopening it. It may take a couple tries for your Springfield to appear again. How to force close the app:
Exit The Simpsons: Tapped Out
Double-click the home button on your device to bring up the multitasking bar at the bottom
Tap and hold the Tapped Out icon until you see the red "minus" button
Tap the red "minus" button to close the app.
1. Go to Settings -> Device -> Applications manager -> Tapped Out
2. Press "Clear data"
3. Choose "OK"
4. Launch game
Game now downloads all updates again
5. Enter email and password.
6. You should now get the following error message: "Warning. Your other device didn't save your springfield. please sign into that device before playing"
7. Choose "Play Now"
8. You should now get the message "Play anyway? Some progress made on your other device might be lost"
9. Choose "Continue"
If that does not work, try deleting and then re-installing your app.
First, make sure you're using iOS version 4.3.3 or later so you can access the "Not On This iPhone/iPad" section of the App Store. On an iPhone, you can find this section in the App Store > Updates > Purchased > "Not On This iPhone." On an iPad, you can find it under App Store > Purchased > "Not On This iPad."
Once you've made sure you have access to this section of the App Store, please deleteThe Simpsons: Tapped Out from your device. To delete the app, tap and hold the "Tapped Out" icon on the home screen of your iOS device until you see an "X" in the upper left-hand corner of the icon. You will get a message asking if you want to "Delete Tapped Out." Tap the "Delete" button to remove the app.
Once the app is deleted, go to the Purchased -> "Not On This iPhone/iPad" section of the App Store and find "The Simpsons: Tapped Out." Tap the "Install" button to reinstall the app.
If none of these solutions work then contact EA technical support
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