Samsung s5830i keeps receiving the same text message repeatedly, how to solve it? If you restore to factory settings, will your system be lost?

Hello, thank you for supporting Samsung products!

Based on your description, try the following operations: 1. Check for network problems 2. Try changing a mobile phone card 3. Restore backup data (phone book, text messages, multimedia documents, etc.) to factory settings (settings —Privacy—Restore to factory settings)

Hope this helps, thank you