The CTM-ONE supports two 2FF style SIM cards. You can install either one or two SIM cards.
For single SIM card installation, it is recommended to use the UPPER slot of the dual-SIM holder. The UPPER slot, referred to as SIM1 slot, is located furthest away from the printed circuit board. The LOWER slot is referred to as SIM2 slot.
In most cases, the device will come with pre-configured, installed SIM(s). If so, SIM card installation is not required.
Accessing the SIM card slots requires removing the battery/back cover. To do this, remove the 4 top cover #4-40 socket head cap screws using a 3/32” Allen key driver (supplied).
The SIM slots are positioned next to the battery.
Be cautious not to dislodge the battery during SIM removal or installation.
When reinstalling the battery cover, ensure that the gasket is in place. Tighten the screws in a criss-cross pattern until snug to achieve an optimal weather-tight seal. Do not over tighten; the recommended torque value is 4-5 in-lb.
For certain applications or configurations, the internal battery may not be installed.
