Question: What happens when the MS receives a MODIFY PDP CONTEXT REQUEST message with a WLAN offload indication information element?
Option 1: The MS ignores the WLAN offload indication and continues to use the existing offload acceptability values.
Option 2: The MS replaces stored WLAN offload acceptability values for this PDN connection with the newly received offload indications and uses the UTRAN offload acceptability value to determine whether this PDN connection is offloadable to WLAN or not.
Option 3: The MS sends a MODIFY PDP CONTEXT REJECT message in response to the MODIFY PDP CONTEXT REQUEST message.
Option 4: The MS stops timer T3396 if it is running for the APN sent by the MS.
Explanation: When the MS receives a MODIFY PDP CONTEXT REQUEST message with a WLAN offload indication information element, it replaces stored WLAN offload acceptability values for this PDN connection with the newly received offload indications and uses the UTRAN offload acceptability value to determine whether this PDN connection is offloadable to WLAN or not. This ensures that the MS has the most up-to-date information about WLAN offloading for the PDN connection.