A software bug uncovered in the LTE/3G module of the LTE3301-Q222 model of LTE Indoor router might result in device malfunction. ZyXEL is well-aware of the issue and assures customers that a solution is ready for repair.
ZyXEL suggests all users of the LTE3301-Q222 to download and install the latest firmware version V1.00(AAYE.3)C0 immediately to keep the issue from happening. The firmware, along with the instructions can be downloaded here.
Please contact your local service or sales representative if you require any further assistance.