SIM Card

In some cases, the device will come with pre-configured, installed SIM(s). If so, SIM card installation is not required.

The CTM-500 supports two mini 2FF style SIM cards. One or two SIMS can be installed. For single SIM card installation, the SIM card may be inserted into either slot, labelled SIM1 and SIM2.

‘SIM2’ slot is located at the top and ‘SIM1’ slot is located at the bottom.

It is advisable to use single-piece SIM cards whenever possible. Many SIM cards today are "tri-cut" to support various SIM card proportions. However, caution must be exercised when using tri-cut SIM cards as the cutaway parts can become dislodged, potentially affecting electrical connectivity between the SIM card and SIM holder.

If a SIM card becomes stuck in the SIM holder, DO NOT attempt to force its removal as this could damage the SIM holder. Please contact Cypress Solutions Support for assistance.

In certain instances where the modem fails to detect a SIM card, this may result from manufacturing tolerances of the SIM card. Adding a thin piece of Scotch tape to the backside of the SIM to slightly increase its thickness can aid in ensuring electrical contact with the SIM holder contacts. We can provide SIM tape for this purpose upon request. Read more at SIM Card Taping.

SIM card insertion and removal

Unlock the SIM card door by sliding it to the left until the door unlocks, then swing the door open.
For single SIM card installation, insert the SIM card into either of the slots of the dual SIM holder. Ensure that the copper contact is facing upwards (chamfered corner to the front left).
If applicable, the second SIM card can be inserted into the other slot of the dual SIM holder.
Close the SIM door securely by sliding it to the right until a ‘click’ is heard.

SIM Removal Tool

The SIM removal tool is used to facilitate the removal of SIM cards. The tool is included with every CTM-500 device shipment.