How to refurbish used cell phones across iPhone, Samsung, Pixel, and the long tail.

Multi-brand cell-phone refurb is a different operation from iPhone-only or Samsung-only refurb. Your toolkit doubles (Apple uses Pentalobe + Tri-point, Samsung uses standard JIS + heat, Pixel uses Torx T5 + heat, Motorola is all over the place). Your parts inventory triples — even the same logical part (front screen) has different SKUs per brand and per generation. The trade-off: you can quote any device that walks in, which means you stop pushing intake to manual quote.

This guide is structured around what's common (the 6-step refurb arc) and what diverges (the device-class-specific issues, parts, and quality gates). Read the per-step body carefully — within each step, the iPhone-specific note, the Samsung-specific note, and the Android-other note are all in there, side-by-side, the way they actually appear on an operator's inspection bench.

Calibrated for an operator-bench setup, not a tinkerer’s kit. Buy the right tools once; the cheap alternatives cost more in damaged screws and rounded heads.

• Multi-bit precision driver set (Apple, Samsung, Pixel, Motorola screws). iFixit Mako or Pro Tech: covers Pentalobe (Apple), Tri-point Y000 (Apple), Torx T2-T5 (Samsung, Pixel), Phillips JIS (Motorola, OnePlus). Generic precision sets miss Pentalobe and round heads on Apple devices.
• Heat pad with variable temp (50-100°C). iPhone adhesive softens at 70°C; Samsung adhesive needs 80-85°C; Pixel adhesive is the most aggressive, 90°C+. Same heat pad, different timer settings per brand.
• Both suction handle AND iSesamo / plastic spudger set. iPhones lift via suction + guitar pick; Samsung phones often need the spudger to walk the seal around the perimeter. Don't use the metal pry tools on glass-back Samsungs — they shatter the back.
• Apple GSX access AND Samsung KIES service tool access. For iPhones: Activation Lock + Apple Care via GSX. For Samsung: Knox status + FRP enrollment via the Samsung service portal. For Pixel + Motorola: Google account FRP check via the bootloader.
• OEM parts accounts at Mobilesentrix + Injured Gadgets + RepairPal. No single supplier covers all brands at OEM grade. Mobilesentrix is strongest on Apple; Injured Gadgets on Samsung; RepairPal on the long tail (Motorola, OnePlus, Pixel).
• Multimeter + brand-specific charging-port breakouts. Apple Lightning and USB-C, Samsung USB-C, Pixel USB-C, Motorola micro-USB and USB-C (older Motorolas are still micro). Universal USB-C is fine for most; Apple Lightning needs a dedicated breakout.

What to inspect for before you quote. Each of these can move margin by $30-$150 per device if you catch it at intake instead of discovering it during refurb.

• iPhone Face ID failing after a non-OEM screen swap (carry-over from previous refurb). About 15% of multi-brand intake iPhones have a previous repair history. If the prior screen was after-market, the Face ID dot projector flex was likely disturbed. Symptom: Face ID enrollment fails on the second-screen replacement. Fix is rare — usually means selling as "Face ID inoperative."
• Samsung Galaxy S22+ green/pink tint on AMOLED corners. A factory defect on a batch of S22+ panels — appears as faint tint at the lower corners under uniform color displays. Not fixable without OLED replacement ($180 part, 35 min labor). Disclose and price down by $60.
• Pixel 7 / 7 Pro: fingerprint sensor failing after factory reset. Google's optical fingerprint sensor (under-display) sometimes fails to re-enroll after a factory reset, especially if the device sat unused for 3+ months. Fix is a soft reset of the sensor via fastboot mode — 4 minutes once you know the command.
• OnePlus 9 / 10 Pro: green flickering after camera app open. A documented firmware bug. Updating to the latest OxygenOS (or HydrogenOS for CN variants) resolves on ~85% of affected devices. The remaining 15% are mainboard issues — parts harvest.
• Motorola Razr (foldable, recent): hinge clutch wear. The Razr hinge has a noticeable clutch resistance change at ~2,000 fold cycles. Many used Razrs come in at 5,000-10,000 cycles. Test the hinge in three positions (closed, 90°, open) before quoting — a worn hinge takes $80 off resale.

The order matters. Steps 1-2 gate everything: if the device fails the iCloud / FRP / Knox check or has unrecoverable cosmetic damage, you save the parts cost by stopping before Step 3.

1. Step 1 — Brand-specific pre-flight check. For Apple: IMEI through GSX → Activation Lock OFF, Apple Care status, GSMA blocklist clean. For Samsung: KIES → Knox status, FRP enrollment status, blacklist. For Pixel/Motorola/OnePlus: fastboot mode → bootloader-unlocked flag (an unlocked bootloader is a yellow flag for theft), FRP via Google account check. Any failure = reject or parts-harvest path.
2. Step 2 — Cosmetic inspection (brand-aware). iPhone: front glass, back glass (12 onward), frame; flag MagSafe ring on 12-series. Samsung: front AMOLED edge crack risk (curved screens are vulnerable), back glass (most S-series have glass backs), camera bump scratches. Pixel: front glass, back glass; Pixel-specific hinge crack on Pixel Fold. Motorola: front + back, hinge cycle test on Razrs. Grading scale is the same (A / B / C); grade-specific cosmetic touch-ups vary per brand.
3. Step 3 — Battery health by brand workflow. iPhone: Settings → Battery → Battery Health (must be 80%+ for "no replacement" listing). Samsung: AccuBattery app or Samsung Members app diagnostic (target 85%+ capacity factor). Pixel: Battery Historian (most accurate) or Settings → Battery → Battery details. Motorola: Moto Care app diagnostic. Replacement cost varies: $40 iPhone, $35 Samsung, $42 Pixel, $30-$45 Motorola depending on model.
4. Step 4 — Component repair priority by brand. iPhone: charging port → battery → screen → back glass → camera lens. Samsung: charging port → battery → display module (Samsung sells screens with frames pre-assembled — more expensive, less labor) → back glass. Pixel: charging port → display → battery (Google batteries are harder to source — buy ahead in batches). Motorola: charging port → display → battery. Replace fewer parts per device than iPhone refurbs because resale prices are lower.
5. Step 5 — Functional test by brand. Apple test matrix: cellular, WiFi, Bluetooth, GPS, accelerometer, all cameras, all mics, all speakers, Face ID re-enrollment, Lightning/USB-C charging, MagSafe (12+), NFC. Samsung: same baseline + S-Pen if S22 Ultra/S23 Ultra/S24 Ultra (S-Pen often dies after factory reset), Samsung DeX over USB-C, fingerprint sensor. Pixel: same baseline + Google Assistant + Pixel-specific features (Now Playing, Live Translate). Motorola: baseline only.
6. Step 6 — Certification, listing, and brand-specific listing notes. WerOrg-style certificate of refurbishment for all brands. Listing photos: 4 sides + on-screen test pattern. Apple-specific listing language: "Genuine Apple parts, no aftermarket components." Samsung-specific: "Original Samsung display, S-Pen functional (if applicable)." Pixel-specific: "Bootloader locked, FRP cleared." Motorola-specific: "Stock firmware, no carrier customization." These specific notes prevent ~30% of buyer disputes.

Public-data averages as of 2026-Q1. Refresh quarterly — parts prices shift with currency rates, supplier inventory, and (occasionally) Apple/Samsung distributor policy.

Toggle the repairs you’d need on a typical intake of this device class. The calculator adds a labor allowance and compares against expected resale.