The CTM-ONE supports two 2FF style SIM cards. One or two SIMS can be installed.
For single SIM card installation, we recommend using the UPPER slot of the dual-SIM holder. The UPPER slot is the slot furthest away from the printed circuit board. The UPPER slot is referred to as SIM1 slot. The LOWER slot is referred to as SIM2 slot.
In most cases the device will ship with a pre-configured, installed SIM(s). In this case, SIM card installation is not required.
SIM card access is via the removal of the battery/back cover by removing the 4 top cover #4-40 socket head cap screws using a 3/32” Allen key driver (supplied).
SIM slots are located next to the battery. Be careful not to dislodge the battery during SIM removal/installation.
Ensure that the gasket is in place when the Battery cover is reinstalled and tighten screws in a x-cross pattern until snug for optimal weather tight seal.
Do not overtighten, recommended torque value: 4-5 in-lb
Note: for some applications/configurations the internal battery may not be installed.
