Easy Simoleons Cheat
I am using version 3.5.0 on an iPhone 5. This is what worked for me using Game Center NOT Facebook:
1) Go to the Home Store. Click on Social. Pick the an item. I've found the record player gives me the most simoleons back, so that's what I always pick.
2) Place as many of that item on your lot as you can.
3) Disable your Game Center Account. To do this: click green button with three white dots > click blue keyhole button > choose Game Center account > click Disable button
4) Go to the Move & Sell part of the Home Store. Sell all of the items you placed for a profit. I sold each record player for a profit of 1,250 simoleons.
5) Go back and enable your Game Center Account. See step 3 for directions.
6) Visit the Party Boat.
***If you try to repeat the cheat without visiting the Party Boat, the game will tell you you don't have enough neighbors even though you do. Just visit the party boat, and you will be able to repeat the cheat without having to close the app or log in/out of Game Center.***
7) Repeat from step 1!!!
Edited: May 2 2013
Added by: ClaudiaVanDamme Apr 28th 2013, ID#2286