DJI Osmo Pocket recently made another firmware update to Firmware v1.3.0.20. The DJI Osmo pocket was activated using an iphone and the first firmware update also used the same phone. I had the same problem before and found this solution. This time, I am using Samsung A7 2018 so a Type C to Micro USB adapter was used.
This process was done for hours and I failed a couple of times but finally succeeded. I documented everything but this is risky so I suggest backing up your files to update to dji osmo pocket's latest firmware.
Here is the link to our old video in updating the dji osmo pocket: • DJI Osmo Pocket Firmware Update Error...