@saihaynes Ah so you had two MDM trying to use the same ASM VPP location? I have been bitten by that myself in the past. I have a location for Meraki and another for Jamf which gets around that issue.
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You may find this explanation of how the HLR functions helpful in explaining the relationship between IMSI, SIM and MSISDN(s). https://nextm2m.com/faq/answers/about-m2m/what-is-home-location-register-hlr/
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