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In order to use a Hologram SIM with Verizon you need to explicitly set the carrier in the modem: Boron LTE- support
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I’m pretty sure this no longer works with Hologram SIMs.
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Even if it did work, because Verizon LTE Cat M1 requires the devices to be certified (by IMEI), and Particle devices are not currently certified, eventually you could be blocked, even it it did work for a while.