The XP8, XP5s and XP3 all support fast charging, allowing you to get the device fully charged and back up in running quicker. The quality of the fast charging will depend on the quality of charging cable being used with devices. We always recommend using the charging accessories you get directly from us at https://store.sonimtech.com/ to ensure the fast charging ability of the phones is being taken advantage of.
If you need any further assistance with this question, please contact the Sonim Customer Experience Center at 1-833-MY-SONIM (1-833-697-6646) or email us at [email protected]. We are open 24 hours a day, Monday-Friday and we will further assist in troubleshooting.