Digi XBee 3 Cellular LTE-M User Manual page 271

API frames
expected to process these indications and the response data is not available if you
attempt to perform a read operation to the characteristic.
d. Decrypt the stream of content provided through the indications, using the stream cipher
as described in the unlock procedure. See
Digi XBee® 3 Cellular LTE-M/NB-IoT Global Smart Modem User Guide
BLE Unlock API - 0x2C.
BLE Unlock API - 0x2C
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