Packet call processing involving packet-based data transfers in a mobile communications system can handle a packet call if the mobile station has the ability to accommodate the packet call even when packet call collision occurs. Upon detecting a packet call collision between a first received packet call and a second received packet call, the mobile station determines whether a Network Service Access Point Identifier (NSAPI) is available and can be allocated to handle the second received packet call. Thus, an increased number of packet calls can be processed simultaneously by the network and/or the mobile station so that Internet-based applications, as well as other high-speed data applications can be handled more effectively and efficiently. Such packet call collision detection and NSAPI allocation techniques are applicable to various wireless and/or mobile communications environments, such as GPRS, UTMS, etc. involving data packet transmissions whereby packet call collisions may occur.