Five cities, namely Bratislava, Košice in Slovakia and Brno, Prague and Ostrava in Czech Republic operate them in various configurations and amounts.

Brno, Bratislava, Ostrava and Košice still operate their originally ordered trams, while the fleet in Prague began retiring in 2015.

Vehicle remained technically same but was made considerably smaller to better suit the operation in Germany due to their much narrower streets and less space between rails.

[3] These two trams were manufactured in 1997 and were used for testing purposes in Prague where they remained until 11 May 2004 when they were acquired by rail engineering company Pars Nova a.s. in Šumperk, where they undergone major refurbishment and re-painting to new livery used by third revision vehicles in Bratislava.

Between April 2016 and June 2019, 40 ex-Prague T6A5/III trams were delivered to Sofia, Bulgaria, where they underwent an upgrade to their visual and acoustic information systems.

[8] Vehicle has angular steel construction with large windows, 3 collapsible doors on the right side and is painted with red-cream livery.

At the start of operation in Bratislava and Košice, speeds as high as 115 km/h (71 mph) were achieved during special tests.

Only exception is light rail line to U.S. Steel factory in the outskirts of Košice, where all trams, not just T6A5, drive at 60 km/h (37 mph) which is maximum speed for this area.

Third revision (noted as T6A5/III) saw renewed livery, redesigned interior, doors, driver's air conditioning, plastic seats with textile coating, new pantograph and electronic information displays.

Only one vehicle of this kind was built in 1998, but due to its atypical origin, it was not operated in regular service because of low reliability.

On 19 January 2009 in Košice, the two-car set #618+619 had an accident with rigid truck on railway crossing followed with derailment and hitting several utility poles, the vehicle has been heavily damaged and has been withdrawn from the service, few passengers were injured.

On 1 September 2008 in Prague, #8671 was hit by an ambulance when entering the light rail depot, there were no injuries and vehicle was withdrawn from the service since then.

[13] On 19 September 2011 in Prague, the two-car set #8697+8698 crashed in high speed to Škoda 14 T standing at the tram stop.