Synchronization between platforms

I can't sync my data

• I lost my data, is it possible to have a backup?
• I accessed my Mobills account and it does not have my data. What do I do?
• My balance is different between the two platforms, what should I do?
• My data ins't synchronizing, what to do?

I have questions about data synchronization

• Can I use the same account on two or more different devices?
• Will you change your phone or will you need to restart the device?
• How does synchronization with the cloud work?