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A comment on The User Experience of Mobile Phone Numbers. Parent comment

Re:The User Experience of Mobile Phone Numbers by Spivak on Sunday December 18, 2016 @04:21PM (#13207723)
GroupMe is another example that doesn't work.
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Re:The User Experience of Mobile Phone Numbers by Johnny555 on Sunday December 18, 2016 @04:25PM (#13207738)
GroupMe worked fine for me using my GV number, they SMS'ed me the validation PIN. I didn't even use my ported cell number, just my original GV number.

I have a very old GV number (at least 7 years old), so maybe not all numbers are flagged as VOIP.

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