Overview
MediaTek GNSS chipsets are detailed on another page but to summarise:
- The MT3333 was announced in January 2013 and used by Garmin from 2013 to 2018.
- It supports GPS / GLONASS / Galileo / BeiDou + QZSS.
- It was used in Garmin watches from 2013-2018.
- The MT3339 was announced in June 2011.
- It supports GPS + QZSS, SBAS ranging, and AGPS
- It was potentially the MediaTek chipset used in earlier Garmin watches, prior to the MT3333.
- The MT3337 can be found in Google results going back to 2010.
- It supports GPS + QZSS.
- It was potentially the MediaTek chipset used in earlier Garmin watches, prior to the MT3333.
Watches
Garmin
fēnix teardowns confirming the MT3333:
- fēnix 3 was released in Jan 2015. MT3333 confirmed by the F Tipi teardown.
- fēnix 5X was released in Jan 2017. MT3333 confirmed by the F Tipi teardown.
- fēnix 5 Plus was released in Jun 2018. MT3333 confirmed by the MDN teardown.
Forerunner teardowns confirming the MT3333:
- Forerunner 220 was released in Sep 2013. MT3333 confirmed by the EE World teardown
- Forerunner 230 was released in Oct 2015. MT3333 confirmed by the Embedded Computing teardown.
- Forerunner 735XT was released in May 2016. MT3333 confirmed by the iFixit teardown.
It is not clear which MediaTek chipset was used prior to using the MT3333, but it could have been the MT3337 (or MT3339).
COROS
The PACE uses the MKT3333:
- PACE was released in Jan 2018. MT3333 confirmed by the FCC teardown.