This report describes issues relating to the GPRS specifications, which lead to the specifications being modified after the placement of GPRS compliant mobiles into the market place.

Where possible the present report clarifies any recommended measures which may be adopted by the GPRS infrastructure to enable interworking to be obtained between the GPRS infrastructure and legacy Mobile Station (MS) implementations of the GPRS specifications.

For each issue this report also defines the time after which all new GPRS mobiles are required to meet the modified specifications.

The lifetime of the herein described measures together with their potential impact on optimal network performance is out of the scope of the present document.