South Korea’s KT has won the latest round in its battle to stop rival SK Telecom (SKT) from running what KT said were deceptive ads for its new tri-band LTE-Advanced service.

A Seoul court has banned the SKT ads, which claim it was the first in the world to commercialise the service, noting they make “false and exaggerated information” since it did not actually commercialise the tri-band LTE service, the Korea Herald said.

The decision comes after KT said the tri-band rollout was only a pilot launch using 100 test phones from Samsung and that the service was not available to regular customers. KT, along with third ranked LG Uplus, filed a complaint in a Seoul court in early January to stop SKT from running what they claimed were “deceptive” ads that misled consumers.

KT noted that since SKT had not yet started selling the first tri-band LTE-A-capable device, Samsung’s Galaxy Note 4 S-LTE, it was inaccurate to claim it had commercialised the service.

SKT said it would stop the ads but is considering appealing the decision.

KT also recently complained that SKT has offered illegal subsidies of more than KRW400,000 in cash rebates for the iPhone 6, Samsung’s Galaxy Note 4 and LG’s G3, prompting the telecoms regulator to investigate it for not complying with the country’s new subsidy regulation that went into effect in October.