Serial and model agreement across three records
Whether the serial and model strings on the packaging, the device body and the system panel agree.
The reading sequence
4 steps, starting at handover and completeness and running to keep the three strings as one dated record. Evidence on this point is read at E1, and 1 of the 4 steps carries a condition that ends the assessment outright.
Get all three records into one frame
Photograph the packaging label, the device's own marking and the system information panel together, so no record can come from a different unit.
Evidence: E1 — one photo containing the packaging label, the device marking and the powered-on system panel, plus one close photo of each record
- All three records appear in the same frame in one photo.
- A close photo follows for each record, sharp enough to read every character.
- Two records share a frame while the third is photographed separately.
- One close photo is soft enough that two characters are ambiguous.
- The three records are photographed separately, with nothing tying one to another.
- The packaging label is missing, covered, or replaced with a blank or handwritten sticker.
Compare the serial strings character by character
Establish whether the three serial strings are identical, reading them as characters rather than as a general impression of agreement.
Evidence: E1 — the three close photos from step 1, read left to right and compared position by position
- The three serial strings match in every character and in total length.
- Characters that look alike, such as zero and the letter O, are checked against the printed font on all three records.
- One record is truncated or partly obscured, so a full comparison cannot be made.
- One string is printed in a different font or spacing from the other two.
- The strings differ in any character, or they differ in length.
- One record carries no serial where the other two carry one.
Compare the model field on the same three records
Read the model number, including any suffix, across the same three records, because the suffix usually carries the region.
Evidence: E1 — the same three close photos, read at the model field rather than at the serial field
- The model string is identical on all three records, including any suffix after the base number.
- The capacity or configuration the system reports matches the one printed on the packaging.
- The base model number matches while one record omits the suffix.
- The system panel shows a base number without the suffix the label carries.
- The model numbers name different configurations.
- A capacity or configuration field disagrees between the system panel and the packaging.
Keep the three strings as one dated record
Fix the comparison in a dated form, because the packaging is the record most often discarded first and the panel changes with the next update.
Evidence: E1 — one dated photo of the packaging label still on the packaging, one of the device marking, and one of the system panel, stored together
- All three photos are kept together with the date the comparison was made.
- The label photo shows the label still attached to the packaging rather than cut out.
- The three photos are kept but the message thread that requested them is not.
- The label is photographed after being removed from the packaging.
- No dated record is kept, and the packaging was discarded before the comparison was made.
- The photos exist only inside a thread that deletes itself.
Why the thresholds sit where they do
The three records here are the only written statements about a unit that a buyer can hold at the same time, and the check is deliberately limited to whether they agree with each other. It does not attempt to decide what a disagreement would mean about the item, because that conclusion cannot be reached from photographs and does not need to be reached for a question to be raised in the message thread. The single-frame rule exists because each record is individually easy to photograph from a different unit, and a composition showing all three closes that route without any tooling. Character-level reading matters more than it sounds: serial strings mix digits and letters in fonts where zero and O, and one and I, are near-identical at phone resolution, and a reader who compares shapes rather than positions will pass a real mismatch. The dated record is last because the panel string changes when the system updates, while the printed records do not.
Common misreads
2 pairs recorded for this point. Each runs in both directions: 1 finding that looks worse than it is, and 1 that looks better.
- looks like Return actually Pass
A packaging serial that appears to differ from the device serial by one character in a soft photo. Read at full size the two strings are identical, and the difference was the font rather than the record.
- looks like Pass actually Return
Three records photographed in three separate images that all read the same. Nothing in the images ties them together, so a set assembled from two units cannot be told apart from a matching set.
Check this point against what you were sent
Insufficient evidence
Nothing decided on serial and model verification yet: 0 of 4 steps have been read.
0 of 4 steps judged
| Step | Reading | Evidence | Stop met |
|---|---|---|---|
| 1. Get all three records into one frameneeds E1 | — | ||
| 2. Compare the serial strings character by characterneeds E1 | The packaging serial and the device serial differ in any character. This point records that the three records do not describe one unit and stops there; it issues no conclusion about the item itself. | ||
| 3. Compare the model field on the same three recordsneeds E1 | — | ||
| 4. Keep the three strings as one dated recordneeds E1 | — |
Sources and checks
- Public community thread — Device threads where two of the three records were photographed together and the third was notn=62
- Editor analysis — Character-pair list drawn from confusions observed in reader testingno sample
Last checked · next review due · status current.
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