Section: 5.3.2.2 UTRAN/GERAN Initial Attach
Content: When a UE attaches to UTRAN/GERAN, it executes the normal attach procedure as defined in TS 23.060[ General Packet Radio Service (GPRS); Service description; Stage 2 ]  [7]. When the UE needs an IP address, it initiates PDP context activation procedure as defined in TS 23.060[ General Packet Radio Service (GPRS); Service description; Stage 2 ]  [7]. This procedure along with PDP context activation is also used to establish the first PDN connection over UTRAN/GERAN when the UE already has active PDN connections over a non-3GPP access network and wants to establish simultaneous PDN connections to different APNs over multiple accesses.