I have three Borons, two v1.10 and one v1.00.
Using the instructions on this page https://community.particle.io/t/boron-3g-lte-europe/46048, and especially this useful project https://github.com/beachviking/particle-electron-r410m-toolbox, I was able to establish successful cloud communication with the two v1.10 models, but not with one v1.00.
As model v1.00 had modem firmware version SARA-R410M-02B-01-L0.0.00.00.05.06 and model v1.10 version SARA-R410M-02B-01-L0.0.00.00.05.08, I decided to update the firmware using these instructions https://community.particle.io/t/ublox-modem-firmware-update/50205/6.
From ublox I got version SARA-R410M-02B-03-L0.0.00.00.05.12_A2.19 so I tryed with it.
Boron v1.00 immediately worked very well, so I decided to update the firmware to two borons v1.10 as well. I successfully updated the modem firmware, but after that I was no longer able to establish a network connection. I also fail to maintain stable communication with the modem to restore the previous version of the firmware.
I tried with different versions of the system-part1, softdevice, bootloader and nothing helps.
Is there any hardware difference between v1.10 and v1.00 that is the reason for this?