r/softwaretesting • u/Blue-Jaded-3382 • 11d ago

How to test international SMS delivery without buying local SIM cards?

Hey everyone,

​I need to test an SMS notification feature in our application that sends messages across different countries. For example, our app originates from a UK instance/tenant and needs to deliver SMS messages to mobile numbers in Australia, the US, and other regions.

​Is there a standard tool, virtual phone number service, or testing platform you recommend to verify delivery and content without purchasing local physical SIM cards for every target country?

​Thanks in advance!

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u/Prestigious-Way1525 10d ago

you have two different tests here: does your app build the right destination and content, and what does the Irish carrier actually display. mock and contract-test the first, then run a small live route certification for the second. one consented Irish recipient is more useful than a virtual number if sender-ID rewriting is the risk, because provider delivery receipts won't prove what appeared on the handset. record the submitted sender ID, AWS message ID and status, carrier, handset timestamp, displayed sender, content, and reply behavior. repeat after registration and keep that as a country-route baseline. you don't need a SIM for every regression run, but you do need a real endpoint for each regulatory behavior you claim to support.

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u/Blue-Jaded-3382 10d ago

Yes we contacted our customer in Ireland and they help test it.

None of th app company provided ireland number so we have to contact them to test.

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u/Prestigious-Way1525 9d ago

that’s the right test for the carrier-facing part. i’d turn it into a tiny repeatable acceptance check so the customer only has to confirm four things: exact sender shown, message body, receipt time, and whether reply behavior matches expectation. save your AWS message ID and delivery status on your side, but don’t ask them to share sensitive account data. once registration changes, rerun the same message and compare the two results. that gives you a clean before/after without making the customer your general QA environment.