@Sunshine My ONE.NZ ISP tech, Mr. Amand, says it's the TP-LINK modem X58-4G and/or firmware causing the dropouts.

@Sunshine Why can't I upload the log file here? Error says "failed to upload". 13k txt file

@Sunshine Thanks for your reply :) X58-4G(1.0) 1.0.0 Build 20220421 Rel. 76943 ISP is ONE.NZ ONE.NZ tech has checked cell tower logs - no issues there. I can resolve by popping the SIM card out/in,...