In this lesson you know that,
After the Attach Procedure succeeds, the following should be accomplished,
- 'MM context' is established on the UE and the SGSN.
- Authentication occurred between the SGSN, and the UE.
- The UE received the P-TMSI, and stored it in its MM context.
- The SGSN retrieved the subscription information of the UE, from the HLR.
- The HLR knows which SGSN is currently serving the UE.