Methods, devices, and systems for coordinating leaving procedure

An apparatus comprising:

• a memory storing instructions;
• and
• a processor in communication with the memory, wherein, when the processor executes the instructions, the processor is configured to cause the apparatus to perform, corresponding to multiple networks comprising a first network and a second network, in response to a trigger condition, sending a mobile terminated (MT) filter assistance information by:
• determining the MT filter assistance information;
• and
• sending the MT filter assistance information to the first network,
• wherein:
• the apparatus indicates a MT filter revoke indication to the first network, and
• the MT filter assistance information that is stored in the first network is deleted upon receiving the MT filter revoke indication from the apparatus.

A non-transitory computer-readable program medium storing instructions, wherein:

• the instructions, when executed by a processor in an apparatus, are configured to cause the processor to perform, corresponding to multiple networks comprising a first network and a second network, in response to a trigger condition, sending a mobile terminated (MT) filter assistance information by:
• determining the MT filter assistance information;
• and
• sending the MT filter assistance information to the first network,
• wherein:
• the apparatus indicates a MT filter revoke indication to the first network, and
• the MT filter assistance information that is stored in the first network is deleted upon receiving the MT filter revoke indication from the apparatus.