Backup contacts, calendar, photos and videos from Sigma Mobile X-Style S3500 sKai

Sigma Mobile X-Style S3500 sKai

Available guides for synchronization to the secure cloud

From device

From Sigma Mobile X-Style S3500 sKai
From Sigma Mobile X-Style S3500 sKai

To device

To Sigma Mobile X-Style S3500 sKai
Guide not available

Supported functions

  • contact synchronization
  • calendar synchronization
  • photo synchronization
  • video synchronization
  • automatic sync

Sigma Mobile X-Style S3500 sKai is supported on PhoneCopy. Please note that following settings may vary a little depending on the firmware version.

Text guideline - How to backup

From Sigma Mobile X-Style S3500 sKai

If you want to backup contacts from your KaiOS device please use following screenshot guide.
  1. Download our PhoneCopy for KaiOS from application KaiOS Marketplace to your mobile device.
  2. After launching the application, create a new account from the application. If you have already created an account on web pages www.phonecopy.com, log in to this existing account in the application.
  3. After succesful login press "Synchronize" for complete synchronization, you can choose "This device >> Server" for one-way sync.

If you need more help with the settings, visit our step by step screenshot guide: How to synchronize contacts to phone with KaiOS

If you need more help with the settings, visit our step by step screenshot guide: How to backup contacts from phone with Kai OS

In the case of problems with synchronization, please contact us.

To Sigma Mobile X-Style S3500 sKai

If you want to backup contacts from your KaiOS device please use following screenshot guide.
  1. Download our PhoneCopy for KaiOS from application KaiOS Marketplace to your mobile device.
  2. After launching the application, log in to this existing account in the application.
  3. After succesful login press "Synchronize" for complete synchronization, you can choose "Server >> This device" for one-way sync.

If you need more help with the settings, visit our step by step screenshot guide: How to synchronize contacts to phone with KaiOS

If you need more help with the settings, visit our step by step screenshot guide: How to backup contacts from phone with Kai OS

In the case of problems with synchronization, please contact us.

User comments

To leave a comment please sign in.

  • Hi, I noticed on your website that the Nokia 8000 4G is listed as supporting calendar sync. However, in my experience after testing it, the local calendar on my phone does not sync with my Google Calendar (which works in the web version). Only contact sync appears to function. Could you please clarify whether calendar sync is actually supported for this device, or if there is a workaround available? Thanks! akiesel, 28/12/2025
    • Yes, you are right, the app only synchronizes contacts and media files. We have replied you in the CardDAV-related thread as well. PhoneCopy support team, 29/12/2025
See whole discussion