ATL LTE18 cell/tower lock: lte1 mbim connect error MAX_ACTIVATED_CONTEXTS

Hi!

I have two ATL LTE18 having the same issue - on different SW releases, but same modem FW:

OS v7.19.6 - Modem FW: EG18EAPAR01A13M4G_01.003.01.003

OS v7.20.2- Modem FW: EG18EAPAR01A13M4G_01.003.01.003

after having set cell lock, both modems disconnect often, and the logs look like this:

lte1 link down
(and then once per second, up to 120 in a row):
lte1 mbim: >>> E #18101 - connect: connect, error: MAX_ACTIVATED_CONTEXTS
(then, this one appears, restoring the LTE connectivity):
lte1 forced reconfiguration due to diffculty setting link up
lte1 link up

the above loop repeats every 3-5 minutes - LTE connectivity is more than half the time down….

The issue appeared after I started to issue a cell/tower lock using 8 cell on startup:

interface/lte/at-chat lte1 input="at+qnwlock="common/4g",8,[redacted]"

The error does not show up when I clear the cell/tower lock.

  • Are other people having the same issue?
  • Any advise, how to resolve it? (I could try the new FW beta, but I would like to see the release notes first… the two devices are a 4 hour drive away…)

Thank you!

Same issue.
ROS 7.23
LTE FW: EG18EAPAR01A13M4G_01.003.01.003

I see red alert, that there's update for LTE modem, but when trying to update modem FW i've got:
This firmware version is not supported in current region.

I'm just curious:

I also have an ATL LTE18, and yesterday a firmware update—EG18EAPAR01A14M4G_01.300.01.300—suddenly appeared.

Only the number 14 in "A14M4G" has changed (it was 13 previously).

Could anyone perhaps tell me what this is all about?

https://forums.quectel.com/t/ec25-euc-does-not-work-with-ru-sim-cards/45204/19