1. Is there a way to bypass the usage of Radius Server to get the MSISDN?
2. If setting up a Radius Server is required, would the following assumption be correct?
(MMS phone > Wap Gateway > Radius Server > Wap Gateway > Application)
Step 1: Phone connects to wap gateway
Step 2: Gateway acts as radius client an sends authentication request to Radius Server
Step 3: Radius server authenticates user and replies to gateway
Step 4: Gateway sends MSISDN in header together with m-send-req to application.