If a thermal work phone also receives calls or notifications, include interruption and return-to-task behavior in the app assessment. The phone’s network generation does not establish what happens to an unfinished capture or inspection note.
Define the interruption states that matter
| Task state | Question after the agreed interruption |
|---|---|
| Thermal view open | Does the operator return to a clear current view? |
| Capture being saved | Can staff identify whether the output was retained? |
| Note being entered | Is the unfinished note available or clearly marked unsaved? |
| Export being prepared | Can staff tell which file is ready and which job it belongs to? |
| Task resumed | Can the operator continue without confusing the previous and current asset? |
Use a test account and known sample records. Have the application and equipment owners select controlled, non-production interruptions. Record the phone, system build, app versions, event and observed result. Do not assume that a visible thumbnail means the full required file was saved.
Agree an exception procedure
If the saved state is unclear, preserve the available record and follow the approved review process. Repeatedly tapping capture or submission can make it harder to identify the intended result. Specify who checks a pending job before a worker repeats it.
The R4 GT listing describes a 4G thermal phone; the P20 Pro listing describes 5G with integrated thermal imaging. These entries do not verify call-time app behavior, simultaneous voice/data service or uninterrupted thermal recording.
This guide reports no call, notification or recovery trial. Use the original-file traceability guide and confirm the delivered app and required service behavior with Phonemax before planning a sample assessment.

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