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* '''SKT (Sunkyong Telecom) provided two development platforms: GVM and SK-VM. GVM based on Mobile C, and SK-VM based on Java. SK-VM was a Java-based development platform, but the execution speed was slower than GVM due to the nature of Java. SK-VM is a J2ME (Java 2 Micro Eidtion) Java execution environment developed
* '''KTF (Korea Telecom Freete) provided Qualcomm's BREW. The biggest advantage is that it is based on C/C++, and unlike other development platforms, it is executed in the form of a native binary rather than being executed based on a VM. it is an integrated platform, but it has been divided into SKT-WIPI, KT-WIPI, and LGT-WIPI. For example, SKT-WIPI and LGT-WIPI supported C/C++, while KTF-WIPI supported only C. Aside from that, many other aspects differed from carrier to carrier.
* '''LGT (Lucky Goldstar Telecom) - MIDP [JAVA]
→Korean cellphones
==Korean cellphones==
'''GVM (General Virtual Machine)''': GVM1X, GVM2X
A mobile platform that eliminates the limitations of the existing GVM and further strengthens functions such as file system, network, and graphics. GNEX is an upgraded version of GVM, and has the advantage of having few capacity restrictions and fast speed, but its penetration has fallen significantly compared to GVM. Therefore, when releasing a GNEX version of a game, we developed both the GVM version and the GNEX version to support phones that do not support GNEX
A mobile platform that adds additional functions such as sound to J2ME (Java 2 Micro Edition) of LG MIDP JAVA SUN. LGT's platform is sometimes called MIDP and JAVA