Define drop-protection requirements by starting with the use you plan to claim. Then write that use into a supplier brief that names the exact case and phone, a test method that fits the use, and pass/fail criteria agreed before any testing starts. A protection claim only means something when the tested case, device, method, and acceptance criteria are all clear.
No single drop height, standard, or pass threshold works for every phone case. Work out the method settings and acceptance limits with your custom phone case manufacturer and a qualified test professional. Then accept a claim only for the setup the report actually covers.
Build the supplier requirement from the intended use
A good requirement is one written brief with four parts, in this order. When preparing specifications for a custom phone case manufacturer, start with the use, because the use decides which method and conditions make sense.
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Intended use and protection outcome. Describe the handling scenario the claim covers, such as everyday drops while the phone is in use. Then name the outcome you want to claim, for example that the phone still works and the screen does not crack. Write this down before anyone picks a method.
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Exact tested configuration. List the phone model, the case SKU and revision, and any installed accessory or screen protector. Each one can change how an impact reaches the device, so the test sample must match the product you plan to sell.
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Method, version, and conditions, with a rationale. Record the method name, its version or procedure number, and why its scope fits your use. Add the conditions it requires, such as impact surfaces, orientations, and which faces or corners take the hit. A method name alone is not a specification. Fill in this part only after technical review confirms the method fits.
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Observable pass/fail criteria. Define what counts as a failure and how you will check it after each drop. Examples include loss of function, screen cracking, or the case separating from the phone. Agree on the acceptance rule and limits before testing, with input from a qualified reviewer.
Keep a separate requirement when something changes the test scope: a new device model, a different case construction, an added accessory, a new claimed use, or different impact conditions. Otherwise, document why the existing result still applies to the new setup.
Screen the test method for scope fit
Before you accept a proposed method, compare what it was written to test with the case use you plan to claim. If the subject or handling scenario is different, the method name does not justify the claim. The two published methods below show how different their scopes can be.
| Method example | Stated subject and use | Limit for a phone-case claim |
|---|---|---|
| IEC 60068-2-31:2008 | Rough-handling shocks to equipment in operational use | Not a phone-case protocol |
| ASTM D5276-19 | Free-fall drops of loaded boxes, cylinders, bags, sacks | Packaging scope, not a case on a device |
IEC 60068-2-31’s rough-handling scope covers knocks, jolts, and falls during repair work or rough handling in use. It states that it does not simulate impacts during transport as loose cargo, which calls for a different test. It also says testing should apply only to the faces and corners at risk of that handling. That is a useful principle for your brief: impact locations should follow the use you claim.
ASTM D5276-19’s loaded-container scope covers how a container and its inner packing protect the contents during a free-fall drop. A passing shipping-carton result says something about packaging. It does not show how a case protects a phone in a user’s hand.
Neither method is an established phone-case standard. Ask your supplier or reviewer to explain in writing which handling the chosen method represents and which conditions and impact points apply. Keep transport-packaging results out of case-protection claims unless someone technically justifies the link.
Review supplier evidence and limit the claim
Match the report to the exact SKU and the exact claim wording before you use it. If key details are missing or the setup is different, ask for clarification or applicable testing. If the evidence covers less than your proposed claim, narrow the claim to fit.
For a model of what a traceable report contains, look at CTIA’s report-documentation example. Its Version 2.1 plan asks for lab name and contact details, the test case and revision, sample model numbers with inspection and test dates, all test parameters and equipment settings, pre- and post-test images, failure descriptions, and an overall result. The plan is limited to smartphone hardware reliability, so treat it as a documentation analogy, not a phone-case requirement.
Use this check on any supplier report:
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Report and samples: Confirm the lab, report date, and sample identifiers are present and traceable.
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Configuration match: Compare the tested phone model, case SKU, revision, and accessories with what you will sell.
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Method and criteria: Verify the method version, conditions, and acceptance criteria match what your brief agreed.
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Results and failures: Read the results for each sample, including any failure images or descriptions, not just the overall pass.
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Decision: Accept the claim within the documented scope, clarify or retest when evidence is incomplete or mismatched, or narrow the wording.
A public record shows what a well-scoped claim looks like. UL’s bounded case-and-phone verification example lists specific iPhone and Samsung models with Imos protectors. It verifies a 1.28 m (about 4.2 ft) transit-drop claim under MIL-STD-810H Method 516.8, Section 4.6.5, Procedure IV. The reported result was no loss of cellular functionality or screen cracking after the assessment. Every part of that claim is tied to listed models, a named procedure, and stated outcomes. It tells you nothing about unlisted phones or other cases.
Apply the same discipline to your own copy. A marketing label or a bare method reference cannot stretch a claim past the tested setup. Your next step is to agree on the test brief and the claim boundary with your supplier and a qualified technical reviewer before production testing begins.
FAQs
Is there one standard drop height for phone cases?
No supplied standard sets a universal height for phone cases. The UL record’s 1.28 m figure applies only to its listed case-and-phone configurations and its named procedure. Choose heights and conditions for your own use with qualified technical review.
Can I reuse a drop report from an older phone model?
Only if someone documents why the result still applies. A new device, case revision, or accessory can change the test scope. Without that rationale, treat the new model as a separate configuration that needs its own evidence.
Does a “military grade” label prove drop protection?
A label by itself does not. A meaningful claim names the method and procedure, the tested case and phone, and the observed outcome, as the UL record does. Ask for the report behind the label and check it against your SKU.
Who should set the pass/fail limits?
Your team should define the protection outcome you want to claim. A qualified test professional should then help turn it into observable checks and acceptance limits, and your supplier should agree to them before testing.
