SMS Testing
Fake DLR: What It Is, How It Works, and How to Detect It
A fake DLR claims delivery success when the message never arrived. Here’s what causes them and how to detect them with real-handset testing.
July 12, 2026
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A fake DLR claims delivery success when the message never arrived. Here’s what causes them and how to detect them with real-handset testing.
To audit your SMS vendor’s OTP delivery, send test messages through your production route to independent handsets with real SIM cards on destination networks.
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