The Verge reports that RED is working on a "pro camera version" of the Hydrogen One smartphone:
RED is working on a new “pro camera version” of its Hydrogen One smartphone, after the original model fell short in a number of ways. RED founder Jim Jannard revealed some basic details last night in a forum post, writing that for this new model, RED’s camera team will be “fully in charge” of the camera system.
RED also removed all Hydrogen One’s promised modules from its website:
One of the biggest things that could have redeemed the RED Hydrogen One was the promise of additional modules that would attach to the back and offer expanded experiences for using the phone. The modules were originally promised for a release later in 2019, but the company has quietly updated its website to strike all mention of the modules