Are you using rsim? This service also works for carrier locked devices with menu access, check supported devices.
-Supported devices: ONLY GSM(NO MEID) Devices iPhone 7 to X (Must not be blacklisted in customer's country)
-NOT Supporte devices: IPADS(not a single one), IPHONE 5S / 6 /6S /6S+ NOT SUPPORTED
DOWNLOAD TOOL: Tool for UNTETHERED+CELLULAR