Hi,
DK:Information.
PCA10090 0.9.0 2019.21 960074892
IMEI:352656100366304
HWID:F1:7D:21:F0:45:76
Contains FCC ID:2ANPO00NRF9160
Contains IC:24592-nrf9160
C:\Users\jhfg>nrfjprog --version
nrfjprog version: 10.9.0
JLinkARM.dll version: 6.80a
step 1: Wipe the chip with nrfconnect programmer and turn off nrfconnect programmer.
step 2: Run a batch test_rbp_all.bat to intercept the picture.

The test information can be found in the annex.nrf9160烧录at_client固件 测试使能读保护.rar
Kind regards, Peter.Min