The deployment of Multipath TCP in Korea goes beyond KT.

Different articles in Korea show the impact that MPTCP deployment is havin in this country.

“Domestically (In Korea), MPTCP which is technology can utilize LTE and WiFi was commercialized. These services are future network technology which improves network speed by combining LTE and WiFi. The service names are ‘GiGA LTE’, ‘Band LTE WiFi’ and ‘GiGA multipath’ at KT, SKT and LG U+ respectively and these services are based on the same technology.”
Source ETNEWS.com

“Evolution of network speed = Domestically, in last June, MPTCP which is similar with LWA was commercialized. This is future network technology which can improve network speed (capacity) by combining LTE and WiFi.
Domestically(In Korea), this service is called ‘GiGA LTE’ at KT. SKT and LG U+ use brand names ‘Band LTE WiFi’ and ‘GiGA multipath’ respectively.”
Source NEXTDAILY