i basically relay comments from matrix channel from some developers.
01.002.01.002 is the most recommended firmware. https://github.com/Biktorgj/quectel_eg25_recovery
01.003.01.003 is the most recent but buggy. https://github.com/Biktorgj/quectel_eg25...003.01.003
even with the 002 firmware, it's more or less buggy. so, none of the firmwares are totally stable.
edit:
i forgot this one, only for informative purposes. it may not apply to the pinephone directly!
https://git.teknik.io/gn0m3dio/EG25-G_GB...nch/master
01.002.01.002 is the most recommended firmware. https://github.com/Biktorgj/quectel_eg25_recovery
01.003.01.003 is the most recent but buggy. https://github.com/Biktorgj/quectel_eg25...003.01.003
even with the 002 firmware, it's more or less buggy. so, none of the firmwares are totally stable.
edit:
i forgot this one, only for informative purposes. it may not apply to the pinephone directly!
https://git.teknik.io/gn0m3dio/EG25-G_GB...nch/master