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Quectel in the documentation for other Qualcomm-based modem explains in details DPO (Dynamic Power Optimization), that is enabled on EG25-G currently. One of requirements for DPO is, that XTRA almanac must be less that 3.5 days old. [1] Additionally SIMCOM says, that information predicted by XTRA is very accurate within 24 hours, but its effectiveness decreases over time. [2] Xtra3 files are available for 1 day (xtra3grc_24h.bin), 3 days (xtra3grc_72h.bin) and 7 days (xtra3grc.bin). Currently 7 days variant is used. Based on recommendations from Quectel and SIMCOM to slightly improve GNSS performance switch default configuration to 24h XTRA variant. 1. https://sixfab.com/wp-content/uploads/2018/09/Quectel_UC20_GNSS_AT_Commands_Manual_V1.1.pdf 2. https://cdn.geekfactory.mx/sim7000g/SIM7000%20Series_GNSS_Application%20Note_V1.03.pdf