You can get upgrade for Segway miniPLUS and Ninebot S from M4M Partners in your area.
M4MPartners.com
https://m4mpartners.com/eupartners
Option 1: Remove Upgrade via WhatsApp:
After you purchase the upgrade M4M will contact you within 24 hours to schedule remote upgrade support session. On average the process takes 5-10min.
To use this option you need to have Android phone and WhatsApp.
Option 2: Upgrade by M4M Local Partners:
After you purchase the upgrade service, please check the link below to see M4M partner in your area.
Hi, i would like upgrade to my Segway S-PLUS, it’s the last model. Can we do the upgrade in remote? About the warranty what will happen? Thanks