Which date should you trust on a phone comparison?
Learn to distinguish policy dates, price observations, imports and editorial reviews, and see which evidence matters for support, parts and offers.
Trust the date attached to the specific fact you are using. A recently updated page can contain an older parts price, a newly observed retailer offer and a support policy published years earlier. Those facts need different checks.
A date is useful when it tells you both what happened and which claim it applies to. “Updated today” cannot, on its own, establish that every price or manufacturer statement was reviewed today. This guide explains how to read the evidence and what a useful record should contain.
Five dates that do different jobs
| Date | What it tells you | What it does not establish |
|---|---|---|
| Source publication or effective date | When a document was published or a policy took effect | That its terms apply to every model or country |
| Observation date | When a particular price or other changing value was observed | That the value is still available at checkout |
| Retrieval or import date | When a copy reached a dataset | That a person checked the source’s meaning |
| Editorial review date | When an explicitly scoped claim was checked | That every other fact on the page was checked |
| Article publication or update date | When the article appeared or materially changed | A fresh verification of all underlying records |
An expiry, support horizon or warranty end date is different again: it describes the subject of the claim. It is not a date of observation or review. A support reference in 2031 could have been published years earlier.
For FixIndex’s current source types and calculations, start with the methodology. Where a field does not provide a review date, treat that date as unavailable. Do not borrow the footer date, article date or a neighbouring price timestamp to fill the gap.
Software support needs the policy as well as the date
Before relying on a support horizon, identify the exact model and region, the publisher of the policy, the kind of updates covered and the event that starts the promised period. Security updates, operating-system upgrades and an update frequency are different claims.
A statement measured from first availability is not measured from the day you buy the phone. A month-level statement also does not justify inventing a precise final day. When a horizon is derived from a duration and a launch month, the derivation should remain visible.
A regulatory reference needs its own label. The European Commission’s ecodesign overview ties the in-scope OS-upgrade period to the end of placement of the model’s last unit, not an individual purchase date.
That distinction is why FixIndex separates a published manufacturer horizon from a calculated EU floor. An EU floor is a conservative comparison reference under the support-date methodology, not a newly announced manufacturer deadline. Reaching a stored reference prompts another check; it is not, by itself, evidence that updates have stopped.
You can use the software-update table to find the reference, then follow the source before making a replacement decision. A longer displayed horizon should not replace checking whether the phone meets your actual needs.
A parts price belongs to a place and a scope
A battery part, a completed battery replacement and a repair quotation are different things. The amount alone does not tell you which one is being compared.
A useful parts record identifies the exact part or compatible model, the source market, currency, observation date and what the amount includes. A return credit, refundable deposit or exchange condition needs to remain visible. Do not silently apply one country’s price to another country or add an assumed tax treatment.
Start at the parts pages, then ask what a completed job would cost: diagnosis, labour, shipping and any extra parts may matter. The repair decision guide explains how to compare that complete quotation with keeping or replacing the device.
A new retailer price cannot refresh an older parts observation. Conversely, a parts price from last month may still be a useful dated reference; it simply needs confirmation before you treat it as an offer available now.
Retailer prices need an exact item and an observation
A useful retailer timestamp belongs to a named offer: seller, listing reference, model, variant, condition, market and price. It is a record of an observation, not a guarantee of stock, delivery or the final payable total.
On FixIndex, inspect the evidence beside an offer. If storage or colour is unknown, keep that uncertainty when comparing it with another listing. A fresh observation does not turn an unidentified variant into a confirmed match.
Our price-history guide explains another important distinction: a new observation for the daily cheapest tracked model offer does not verify the historical price of every individual listing. Today’s metadata should not be projected backwards without evidence.
What a clear evidence record should look like
Here is the structure we want a reader to be able to inspect. It is a publication standard, not a claim that every existing field already has a complete review log.
| Element | Useful content |
|---|---|
| Claim and scope | The value, exact model or part, variant and applicable market |
| Source | A link to the relevant policy, product document or offer |
| Source timing | Publication or effective date, when the source provides it |
| Observation and retrieval | When changing data was seen and when its copy was imported |
| Review | The date and limited subject of an actual editorial check, if one occurred |
| Interpretation | Any calculation, unresolved conflict or reason the value remains unknown |
If the source does not give a publication date, say so. If a feed was fetched automatically, call that an import. If a calculation uses an assumption, show the assumption. These distinctions make it possible for a later reader to reproduce or challenge the conclusion.
What to do when two sources disagree
First make sure they concern the same model, region and type of claim. A general launch announcement and a model-specific policy may answer different questions. Prefer evidence that directly addresses the exact claim; do not simply choose the page with the newest-looking date.
If the conflict remains unresolved, keep both references visible and describe the uncertainty. For a purchase you need to make now, ask the manufacturer or seller to clarify the term that affects your decision. An unexplained confident date is not a substitute for that answer.
FixIndex’s corrections policy asks for the affected page, the specific claim, a source link and the model or country when relevant. A useful correction changes the affected evidence or calculation and records a material change. It does not rewrite an old publication date to suggest the article is brand new.
Use the dates to make a better decision
When you use the cost-per-year calculator, choose a realistic ownership period and understand which support reference you are comparing it with. When you compare repair and replacement, confirm the quotation. When you buy, confirm the retailer’s checkout total.
Each check addresses a different risk. None requires treating a recently built page as a universal guarantee of fresh data.
Sources and scope: published 3 November 2026. This article explains FixIndex’s current methodology and proposes a clear standard for reading individual evidence records. It does not report a new review of every catalogue record. Read our affiliate disclosure for the commercial context; a commission does not resolve a missing source or an uncertain date.
How shop links work: Affiliate disclosure.