Physical phones work but Reddit's behavioral detection is way more sophisticated now. They track comment velocity, subreddit hop patterns, vote timing sequences across accounts.
Running automation on physical devices helps with device fingerprinting but won't save you if your action patterns are identical across accounts. Same typing cadence, same session lengths, same subreddit sequences = flagged regardless of hardware.
The maintenance overhead is brutal compared to what you get. You need different carriers per device (they cross-reference IMSI), separate Google accounts with realistic app usage history, varied hardware models to avoid clustering detection.
From what I've seen work: human-assisted posting where real people use the phones during realistic hours, not full automation. Pure automation gets caught on behavioral signals within 2-3 weeks even on genuine hardware