Please note that this system is separate to Apple's iCloud system, as it caters for all platforms (iOS and Android).
Q: How do I upload my save data?
To upload your save data to the Cloud, enter the options menu in the Sims FreePlay and then choose the Cloud icon.

You will have an option to upload save data, or download save data from the Cloud if the progress on your device is significantly different to the save file you have on the Cloud. Visiting the Party Boat to collect your daily social rewards will also automatically upload your save data to the Cloud for you too, ensuring that your town's changes are kept up to date on the servers, should your friends want to come and visit you!
If your current save data on the Cloud is up to date with what's on your device, it will let you know in the information window on this screen:


A Facebook or Game Center (Apple only) account is required to access this feature, as your save data will need to be attached to your unique ID number so that you can access it again. Don't worry if you don't have one, the team is investigating more options for this!

Q: How can I transfer my save data to a new device?
You can transfer or restore your previously backed-up data for the Sims FreePlay if you need to upgrade or switch devices as well. Always make sure that you upload your current save data to the Cloud before changing devices. You can then login to the Cloud menu on your new device using the same Facebook or Game Center account that you did to upload it previously and tap "DOWNLOAD SAVE DATA" to transfer the content.
Q: I have devices on different platforms. Can I still transfer my save data between them?
Of course you can! Just make sure that you're using the same Facebook account on both of your devices (Game Center login is iOS only).
Q: How long does my save data stay on the Cloud?
Your save data will be available for up to six months from the time that you uploaded it last. But as mentioned previously, we highly recommend uploading your save data regularly to make sure it's up-to-date!
Source: https://firemonkeys.zendesk.com/entries ... I-lose-it-