

Some big-endian architectures are supported, but not RISC-V:
A related problem is big-endian support, which is also 32-bit only, and also obsolete. Its removal is blocked because IBM is still supporting big-endian mainframe and PowerPC systems; as long as that support continues, big-endian support will stay in the kernel.
Technically it is Voice over LTE, so it cannot be used over any internet connection (e.g. over LAN, WIFI or GRPS).