# Universal Grading Protocol (UGP)

> An open standard for describing the condition of a used phone or tablet: one record, six grade names (New Sealed, New Open Box, Like New, Very Good, Good, Acceptable) with a one-line test each, and a status instead of a grade for any device that is not ready to resell. Stewarded by Device Supply. Text under CC BY-ND 4.0.

The normative text is the Specification. Documentation and Adopt pages are informative. Cite a version: https://devicegrading.com/v1.0/spec. v1.0 is a public comment draft.

## Specification
- [The whole v1.0 specification as one Markdown file](https://devicegrading.com/v1.0/ugp.md)
- [Universal Grading Protocol v1.0](https://devicegrading.com/v1.0/spec.md): The normative text of UGP v1.0, a public comment draft: status, steward, licence, how to cite it, and its sections.
- [§8 Battery axis](https://devicegrading.com/v1.0/spec/battery.md): The battery axis of UGP v1.0 (§8): battery health bands, the 80% rule and the charge-hold test for used phones and tablets.
- [§13 Conformance and claims](https://devicegrading.com/v1.0/spec/conformance.md): Conformance to UGP v1.0 (§13): the conformance levels, the verification tiers and the claim format an adopter uses to say how it grades.
- [Conventions](https://devicegrading.com/v1.0/spec/conventions.md): How to read the specification: shall, should and may, and which sections are informative.
- [§12 Core code](https://devicegrading.com/v1.0/spec/core-code.md): The compact, machine-readable string that encodes one UGP record: grammar, regular expression and examples.
- [§5 Cosmetic axis](https://devicegrading.com/v1.0/spec/cosmetic.md): Defect types, scratch levels, cosmetic values, the inspection protocol and the phone tolerance table.
- [§10 Data, parts, kit and Premium](https://devicegrading.com/v1.0/spec/data-parts-kit.md): Data sanitisation, the parts manifest, the Premium designation and the kit.
- [Annex A Fault lexicon](https://devicegrading.com/v1.0/spec/fault-lexicon.md): Every fault code, its default severity and the profiles it applies to.
- [Annex F Figures](https://devicegrading.com/v1.0/spec/figures.md): Figures 1 to 4: surface zones, defect levels, inspection protocol and grade display.
- [§7 Functional axis](https://devicegrading.com/v1.0/spec/functional.md): Key and secondary functions, fault codes and the functional status FF, FM, FJ, FK or FX.
- [§18 Governance and versioning](https://devicegrading.com/v1.0/spec/governance.md): The steward, MAJOR.MINOR versions, profile packs, deprecation and the change process.
- [§0 Introduction](https://devicegrading.com/v1.0/spec/introduction.md): Why device grading needs one record per device and plain grade names in a fixed order.
- [§17 Licence, names and certification](https://devicegrading.com/v1.0/spec/licence.md): The CC BY-ND 4.0 licence, free use of the standard, and the policy for the UGP name and badges.
- [§9 Locks, operator lock and identity](https://devicegrading.com/v1.0/spec/locks.md): Account and management locks, the operator (carrier) lock, and the lost or stolen check or declaration.
- [§15 Mapping to other systems](https://devicegrading.com/v1.0/spec/mapping.md): How UGP maps to CTIA, R2 and marketplace condition names, without claiming equivalence.
- [Annex D Mapping to other systems](https://devicegrading.com/v1.0/spec/mapping-table.md): The informative table mapping UGP grades to CTIA v5.1, R2 and marketplace condition names.
- [§14 Application to marketplaces and B2B trade](https://devicegrading.com/v1.0/spec/marketplaces.md): Evidence, material misgrades, anonymity, lot grading, version pinning and grade accuracy on any sales channel.
- [Annex C Official names in other languages](https://devicegrading.com/v1.0/spec/names.md): Annex C of UGP v1.0: the official grade names in English and Canadian French, the only list where both languages appear together.
- [§6 New devices](https://devicegrading.com/v1.0/spec/new-devices.md): New Sealed and New Open Box: what qualifies, and the kit of an open-box device.
- [§16 Device-class profiles](https://devicegrading.com/v1.0/spec/profiles.md): Device-class profiles in UGP v1.0 (§16): the complete Phone and Tablet profiles, and the profile packs to come for other devices.
- [§19 Public comment](https://devicegrading.com/v1.0/spec/public-comment.md): The 30-day public comment period: how to comment, what is open and what is settled.
- [§4 The UGP record](https://devicegrading.com/v1.0/spec/record.md): What a UGP record contains, and why the grade is derived from it and never entered by hand.
- [Annex B JSON record schema](https://devicegrading.com/v1.0/spec/record-schema.md): The outline of the JSON record schema published at /schema/v1.0/record.json.
- [§2 References](https://devicegrading.com/v1.0/spec/references.md): Normative and informative references, including NIST SP 800-88 Rev. 2, ISO 2859-1 and CTIA v5.1.
- [Annex G Revision history and contributors](https://devicegrading.com/v1.0/spec/revision-history.md): Annex G of UGP v1.0: the revision history of the Universal Grading Protocol, version by version, and the people who contributed to it.
- [§1 Scope](https://devicegrading.com/v1.0/spec/scope.md): What UGP describes, which device classes v1.0 covers, and what UGP does not do.
- [§11 Status and grade](https://devicegrading.com/v1.0/spec/status-and-grade.md): How a record's status is derived, the six grades, what every grade means, and the display rules.
- [§3 Terms and definitions](https://devicegrading.com/v1.0/spec/terms.md): Axis, grade, status, crack, surface zone, basis, encumbrance, core code and the other defined terms.
- [Annex E Worked examples](https://devicegrading.com/v1.0/spec/worked-examples.md): The worked examples and golden files every implementation's derivation reproduces.

## Documentation
- [Universal Grading Protocol](https://devicegrading.com/v1.0/docs.md): An open standard for describing the condition of a used phone or tablet: one record, six grade names, and a test anyone can repeat.
- [How mapping works](https://devicegrading.com/v1.0/docs/crosswalks.md): UGP maps to CTIA v5.1, R2 and marketplace condition names. A mapping says where a UGP grade lands, never that the systems are the same.
- [CTIA v5.1](https://devicegrading.com/v1.0/docs/crosswalks/ctia.md): Where each UGP grade lands on the CTIA Wireless Device Grading Scales v5.1: cosmetic grade, primary grade and consumer tier.
- [Marketplaces](https://devicegrading.com/v1.0/docs/crosswalks/marketplaces.md): Where each UGP grade lands in the condition names of Back Market, Amazon Renewed, Swappa, eBay and Google Merchant.
- [R2v3](https://devicegrading.com/v1.0/docs/crosswalks/r2v3.md): Where each UGP grade lands in the SERI R2v3 equipment categories. A mapping says where a grade falls, never that the two systems are the same.
- [Wholesale A–D sheets](https://devicegrading.com/v1.0/docs/crosswalks/wholesale.md): How to read a supplier's A/B/C/D price-sheet grade against UGP, and how to publish a sheet graded to UGP.
- [FAQ](https://devicegrading.com/v1.0/docs/faq.md): Short answers to common questions about UGP grades, statuses, batteries, locks, parts, licensing and the public comment draft.
- [The ladder](https://devicegrading.com/v1.0/docs/grades.md): The six UGP grades in their fixed order, from New Sealed to Acceptable, with codes, French names and one-line tests.
- [Acceptable](https://devicegrading.com/v1.0/docs/grades/acceptable.md): UGP grade D, Acceptable: heavy cosmetic wear, deep scratches, dents and chips, on a working device that is never cracked.
- [Good](https://devicegrading.com/v1.0/docs/grades/good.md): UGP grade C, Good: clear scratches or small dents you can feel on the body, screen marks invisible when it's on.
- [What every grade guarantees](https://devicegrading.com/v1.0/docs/grades/guarantees.md): Every UGP grade, from New Sealed to Acceptable, means a resale-ready device. The grade name then describes appearance only.
- [Like New](https://devicegrading.com/v1.0/docs/grades/like-new.md): UGP grade A, Like New: looks new, nothing you can see at arm's length. Its test, zone tolerances, guarantees and mappings.
- [New Open Box](https://devicegrading.com/v1.0/docs/grades/new-open-box.md): UGP grade OB, New Open Box: box opened, never activated, no wear, fully functional. Handset only when there is no box.
- [New Sealed](https://devicegrading.com/v1.0/docs/grades/new-sealed.md): UGP grade NS, New Sealed: factory-sealed box, never opened, never refurbished, resealed or issued as a warranty replacement.
- [Premium](https://devicegrading.com/v1.0/docs/grades/premium.md): Premium is a designation on Like New, not a grade: a flawless display, battery at least 90% measured, and every tracked part genuine and verified.
- [When there is no grade](https://devicegrading.com/v1.0/docs/grades/statuses.md): A device that is not ready to resell gets a status instead of a grade: Prohibited, Encumbered, Unsanitized, Parts, Repair or Not graded.
- [Very Good](https://devicegrading.com/v1.0/docs/grades/very-good.md): UGP grade B, Very Good: light marks on the body you can see but not feel, screen near perfect. Its test, tolerances and mappings.
- [Console, handheld and controller](https://devicegrading.com/v1.0/docs/profiles/console.md): Not published yet: until the console, handheld and controller pack is, these devices are graded on UGP's generic axes only, as provisional records.
- [Earbuds](https://devicegrading.com/v1.0/docs/profiles/earbuds.md): The earbuds profile pack is not published yet. Until it is, earbuds are graded only on UGP's generic axes, as provisional records.
- [Laptop and desktop](https://devicegrading.com/v1.0/docs/profiles/laptop.md): Not published yet: until the laptop and desktop pack is, these computers are graded on UGP's generic axes only, as provisional records.
- [Phone](https://devicegrading.com/v1.0/docs/profiles/phone.md): The UGP Phone profile (PHN), complete in v1.0: surface zones, key and secondary functions, display faults, tracked parts, kit, battery and photo set.
- [Tablet](https://devicegrading.com/v1.0/docs/profiles/tablet.md): The UGP Tablet profile (TAB), complete in v1.0: the Phone profile with every tolerance count × 1.5, rounded down, and a kit that may add stylus and keyboard.
- [VR headset and smart glasses](https://devicegrading.com/v1.0/docs/profiles/vr.md): Not published yet: until the VR headset and smart glasses pack is, these devices are graded on UGP's generic axes only, as provisional records.
- [Smartwatch and tracker](https://devicegrading.com/v1.0/docs/profiles/watch.md): Not published yet: until the smartwatch and tracker pack is, these devices are graded on UGP's generic axes only, as provisional records.
- [Quick start: grade a phone](https://devicegrading.com/v1.0/docs/quick-start.md): Grade one used phone to UGP v1.0, step by step: identity, function, battery, locks, data, cosmetic inspection, parts, kit and the claim.
- [Read a UGP grade](https://devicegrading.com/v1.0/docs/read-a-grade.md): What a UGP grade tells you: the name and its test, the four-bar meter, the code, the disclosures and the version.
- [Why UGP](https://devicegrading.com/v1.0/docs/why-ugp.md): Device grades do not mean the same thing from one source to the next. UGP gives every source one record and one set of plain names.

## Adopt
- [Adopt UGP](https://devicegrading.com/v1.0/adopt.md): How marketplaces, refurbishers and software vendors adopt UGP: grade to it, show it, claim it. Free, with no permission needed.
- [Downloads](https://devicegrading.com/v1.0/adopt/badge-kit/downloads.md): Download the UGP v1.0 badge kit: grade badges and the “Graded to UGP” mark as SVG and PNG, light and dark, three sizes, plus design tokens.
- [Grade badges](https://devicegrading.com/v1.0/adopt/badge-kit/grade-badges.md): The approved UGP grade badges: names with the four-bar meter, green only for New, purple only for Premium, in English and French.
- [“Graded to UGP” mark](https://devicegrading.com/v1.0/adopt/badge-kit/graded-mark.md): The “Graded to UGP” mark shows that a listing, price sheet or invoice uses UGP. It always names the version, conformance level and verification tier.
- [Adoption checklist](https://devicegrading.com/v1.0/adopt/checklist.md): One list to check before you show your first UGP grade: grading, records, display, claims, versions and disputes.
- [Claim format](https://devicegrading.com/v1.0/adopt/claim-format.md): How to say a device is graded to UGP: the version, the conformance level and the verification tier, every time.
- [CSV and price sheets](https://devicegrading.com/v1.0/adopt/csv-and-price-sheets.md): Suggested columns for UGP grades in CSV exports, feeds and wholesale price sheets, with the rules a sheet has to follow.
- [Core-code decoder](https://devicegrading.com/v1.0/adopt/decoder.md): Paste a UGP core code and see what each segment means, the grade or status it derives, and what has to be disclosed with it.
- [Display rules](https://devicegrading.com/v1.0/adopt/display-rules.md): How to show a UGP grade on a listing, a price sheet, an invoice or a label: name, test, disclosures, version and language.
- [Golden examples](https://devicegrading.com/v1.0/adopt/golden-examples.md): The golden-file set: UGP records with their expected status, grade, Premium and core code. Every implementation's derivation reproduces them.
- [Implementers](https://devicegrading.com/v1.0/adopt/implementers.md): Businesses and products that grade to UGP or display UGP grades, as they describe themselves. A listing is not an endorsement.
- [Reference derivation](https://devicegrading.com/v1.0/adopt/reference-derivation.md): How a UGP record becomes a status, a grade, a Premium flag and a core code, as steps an implementation can follow.
- [JSON schema](https://devicegrading.com/v1.0/adopt/schema.md): The UGP v1.0 record schema, JSON Schema 2020-12, at /schema/v1.0/record.json: identity, the eight axes, the derived result and the audit fields.
- [UGP Verified (reserved)](https://devicegrading.com/v1.0/adopt/verified.md): “UGP Verified” is reserved for devices inspected under the steward's certification programme and for approved graders. The programme is not open yet.
- [JSON schema](https://devicegrading.com/schema/v1.0/record.json)

## Governance
- [Governance](https://devicegrading.com/governance.md): How UGP changes and who looks after it: versions, public comment, proposals, decisions, the licence and the steward.
- [Changelog](https://devicegrading.com/governance/changelog.md): Every published version of UGP, what changed, and when it takes effect.
- [Contact](https://devicegrading.com/governance/contact.md): How to reach the UGP steward: comments, proposals, listing requests, permission questions and privacy requests.
- [Contributors](https://devicegrading.com/governance/contributors.md): Who wrote UGP and who has contributed to it. The roster is open: anyone whose proposal or comment is used can be credited.
- [Decisions](https://devicegrading.com/governance/decisions.md): The decisions log: every proposal and public comment the steward has decided, with its reasons, quarter by quarter.
- [Licence](https://devicegrading.com/governance/licence.md): Using UGP is free and needs no permission. The text is licensed under CC BY-ND 4.0; the UGP name and badges have their own policy.
- [Name and badge policy](https://devicegrading.com/governance/name-and-badge-policy.md): What anyone can do with the UGP name, grade names and badges without asking, and what needs the steward's written agreement.
- [Privacy notice](https://devicegrading.com/governance/privacy.md): What devicegrading.com collects through its comment and proposal forms, Ask AI and page feedback, why, who processes it and how long it is kept.
- [Propose a change](https://devicegrading.com/governance/propose.md): Anyone can propose a change to UGP. The steward reviews proposals every quarter and publishes every decision with its reasons.
- [Public comment](https://devicegrading.com/governance/public-comment.md): UGP v1.0 is open for comment for 30 days. How to comment, what is especially open, what is settled, and what happens to your comment.
- [Steward](https://devicegrading.com/governance/steward.md): Device Supply is the steward of UGP: what the steward does, what it does not do, and how its own marketplace is kept separate.
- [Translations](https://devicegrading.com/governance/translations.md): UGP is published in English and Canadian French. Official translations come only from the steward; how drafts and reviews are marked.
- [Versioning](https://devicegrading.com/governance/versioning.md): UGP versions use MAJOR.MINOR. How versions are numbered, pinned, cited and retired, and what the working draft is.
- [All versions and PDFs](https://devicegrading.com/governance/versions.md): Every version of UGP, with its status and its downloads: web text, PDF in English and French, Markdown, JSON schema and golden files.

## Optional
- [Français : la spécification v1.0 (traduction en révision ; la version anglaise fait foi)](https://devicegrading.com/fr/v1.0/spec)