I have seen many wireshark logs and found mainly two types of attach request, one is known as "EPS attach" and another one is known as "Combined attached". I want to know, how does UE nas layer decide on "attach type" in attach request ?
Does UE send APN information while registering with network using the "Attach request" message ? How MME come to know that UE should attach to APN "XYZ" ?
