Environment
Onomondo app: individual SIM page
SMS
Question
Is there a way to restrict outgoing SMS from the device without restricting incoming SMS?
Can I disable MO SMS, but still send MT SMS?
Will disabling SMS on the SIM affect incoming SMS sent to the device?
Answer
No. You cannot restrict outgoing (Mobile Originated - MO) SMS without effectively disabling incoming (Mobile Terminated - MT) SMS.
Disabling SMS on a SIM level will effectively block:
outgoing SMS (MO SMS),
incoming SMS (MT SMS),
registrations on the circuit-switched side of the network (GSM).
Cause
Sending MO (Mobile Originated) SMS is an action performed by the device, not the SIM. We recommend ensuring that the module firmware is optimized for SMS behavior to avoid undesired SMS sent by the device.