Start with a quick, controlled triage: verify the router is registered on the expected carrier and band, and capture current RSRP, RSRQ and SINR along with the serving cell ID. Then compare performance using a known-good antenna or a different router on the same SIM to see if the problem follows the hardware or the radio path. Review WAN health-check results, recent reboots, VPN status, and logs for errors. Do a short speed test at several times of day to see if the issue is time- or load-related. If you can share time-series data with us, we can help interpret what the readings are telling us about radio quality, antenna path or configuration.
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What quick tests should I run first to triage speed?
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