How to test, certify, and resell a used iPhone.
Synapse gives every technician the same inspection flow, then turns the result into a certificate buyers can verify.
One process. Three outcomes.
Test, certify, and resell — a repeatable flow the whole team follows, so quality stays consistent no matter who is at the bench.
- 01
Test
Run the full 50-point hardware inspection on the device. Every result is measured on-device, not estimated.
- 02
Certify
The run becomes a verifiable, tamper-evident certificate with a clear result and a scannable reference.
- 03
Resell
Attach the certificate to the listing so buyers can confirm condition before they commit.
Run the full hardware inspection.
- Display and touch
- Cameras and video
- Speakers and microphones
- Sensors and biometrics
- Buttons and haptics
- Wi-Fi, Bluetooth, GPS, and cellular
- Battery health
- Find My and activation lock
- Wipe verification
Turn the run into a certificate.
- Non-identifying device facts only
- No personal data ever shown
- Server-issued and tamper-evident
- Verifiable with a scannable reference
Attach proof to the sale.
- Reduces uncertainty for the buyer
- Supports consistent grading across the team
- Helps buyers trust the listing
- Creates a defensible inspection record
Built for more than one technician.
Every bench works under one organization, with roles, shared credits, and a single place to manage billing.
Owner, admin, and member roles
Role-based access keeps control with owners and admins while technicians run checks at the bench.
Invite technicians by email
Owners and admins invite technicians by email, up to the seat limit on your plan.
Shared allowance
Every plan refills into one shared credit pool the whole team draws from — no per-seat juggling.
Monthly refill
Checks reset each billing period, so your allowance is predictable from month to month.
Stripe billing portal
Manage your subscription, seats, and plan changes from the Stripe billing portal at any time.
How it works — common questions
Testing, certifying, and reselling a used iPhone with Synapse.
How do I test a used iPhone before reselling it?
Run the Synapse 50-point inspection on the device. It checks display and touch, the wide, ultra-wide, telephoto, and front cameras, speakers and microphones, sensors and biometrics, buttons and haptics, Wi-Fi, Bluetooth, GPS, and cellular, battery health, Find My and activation-lock status, and wipe verification — all measured on-device.
What does a certified check produce?
Each certified check produces a tamper-evident certificate with a clear result and a scannable reference. The certificate travels with the device, so buyers can verify condition without taking your word for it.
Does the certificate show any personal information?
No. A certificate shows non-identifying device facts only — model, iOS version, capacity, pass and fail counts, inspection date, validity, and result. No personal data is ever included.
Can my whole team follow the same process?
Yes. Every technician runs the same inspection flow under one organization. Owners and admins manage roles and invite technicians by email, and the whole team draws from one shared credit pool that refills each billing period.
Where can I attach the certificate when I sell?
Add the scannable reference to your listing on eBay, Swappa, Back Market, Mercari, Facebook Marketplace, or a wholesale lot. Buyers scan it to confirm the device passed a documented inspection before they commit.
Certify your next phone with confidence
Subscribe your shop in minutes. Run the 50-point inspection, issue verifiable certificates, and grade every device the same way — every time.