Operators can implement their own systems or use its Jibe Platform, according to Google. The GSMA group that represents the carriers says that the Android system will be supported by a formal accreditation process and be available for other operating systems. Google will also supply an open source version that would work with Android forks commonly used in China and elsewhere. There's no word yet on whether other American carriers, like AT&T and Verizon, will opt in as well. However, T-Mobile already supports RCS, likely because it acquired MetroPCS -- the first US carrier to adopt the standard -- back in 2013.