This European Telecommunications Standard (ETS) describes the technical characteristics and methods of test for Mobile Stations (MS), for the Pan European digital cellular communications system and Personal Communication Systems (PCS) operating in the 900 MHz and 1800 MHz band (GSM900 and DCS1800), standardized by ETSI Technical Committee Special Mobile Group (SMG). This ETS with methods of test is produced as a draft ETS. A subset of the tests is referenced in the GSM Common Technical Regulations (CTRs) and is used for regulatory conformance testing according to the EEC procedures for Telecommunications Terminal Equipment (TTE) type approval (EC Directive 91/263/EEC; also known as the Terminal Directive or Second Phase Directive). The remaining tests can be used to verify conformance with the GSM core technical specifications for those requirements that are not considered essential in the sense of the EC Directive 91/263/EEC (Article 4). This ETS covers the minimum characteristics considered necessary in order to provide sufficient performance for mobile equipment and to prevent interference to other services or to other users, and to the PLMNs. It does not necessarily include all the characteristics which may be required by a user or subscriber, nor does it necessarily represent the optimum performance achievable. It applies to the public land mobile radio service in the GSM900 and DCS1800 systems, using constant envelope modulation and operating on radio frequencies in the 900 and 1800 MHz bands respectively with a channel separation of 200 kHz and carrying 8 full rate channels or 16 half rate channels per carrier according to the TDMA principle. This ETS is part of the GSM-series of technical specifications. This ETS neither replaccs any of the other GSM technical specifications or GSM related ETS, nor is it created to provide full understanding of (or parts of) the GSM900 and DCS1800 systems. This ETS lists the requirements, and provides the methods of test for testing a MS for conformance to the GSM standard. For a full description of the system, reference should be made to all the GSM technical specifications or GSM related ETSs. Clause 2 provides a complete list of the GSM technical specifications, GSM related ETSs, and ETRs, on which this conformance test specifications is based. This ETS applies to the unit which includes the hardware to establish a connection across the radio interface. If there is a difference between this conformance test ETS, and any other GSM technical specification or GSM related ETS, then the other GSM technical specification or GSM related ETS shall prevail.