Android has real built-in forwarding menus — plus a couple of features that can silently defeat them.
Pixel / most phones: Phone → ⋮ → Settings → Calls → Call forwarding. Samsung: Phone → ⋮ → Settings → Supplementary services → Call forwarding.
Always forward sends every call to Relayra. For backup mode, set When unanswered (and ideally busy + unreachable) to your Relayra number — leave Always off so your phone still rings.
Dial *72 + your Relayra number for every call, *71 + number for missed/busy, *73 to turn off. Full tap-to-copy walkthrough: call-forwarding guide.
Pixel's automatic Call Screen answers unknown calls on the phone itself to screen them — so the call never rings out to your carrier, and missed-call forwarding never gets the chance to send it to Relayra. Set it to manual: Phone app → ⋮ → Settings → Spam and Call Screen → Call Screen, and turn off automatic screening (calls from saved contacts are never auto-screened).
Google's "Filter suspected spam calls" and Samsung Smart Call decline filtered calls at the device — those calls fall through to your missed-call destination, which is now Relayra. That's usually fine (real customers misflagged as spam still get answered). Just check the filter isn't set to its most aggressive mode: Samsung's is under Phone → ⋮ → Settings → Caller ID and spam protection.
DND doesn't break forwarding — silenced calls still ring out and reach Relayra. But DND will mute Relayra's transfer calls and summary texts to you. Star your Relayra contacts in the Contacts app, then allow starred contacts: Settings → Modes → Do Not Disturb → People (older Androids: Settings → Sound & vibration → Do Not Disturb). "Allow repeat callers" is a good backstop.
Add your Relayra business number, the number that sends alert texts, and any owner-transfer number — then star them. Suggested names: Relayra Business Line, Relayra Alerts, Relayra Owner Transfer.
Android can throttle background apps until notifications arrive late — or not at all. For your SMS and email apps: Settings → Apps → [app] → Battery → Unrestricted. Worth re-checking after major system updates, which sometimes reset this.
From another phone, call your business number and don't pick up. Relayra should answer with your greeting and a summary should arrive right after. If it doesn't, revisit Part 2, step 1.