This phone texting support hardware is tiny compared to the size and weight increase the v2 sats took on for their primary mission, broadband capacity, which went from from about 20 Gbps per bird in the v1 config to as much as (estimated) 80-100 Gbps per sat in this v2(mini) config. It was this increase that made the sats that much heavier and cut the total number per launch about in half.