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  Comment: Add Plenty Of Fish 
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  Comment: Add 1 entry Google 2FA 
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| Google (account verification), 1, 1, 2022-05 , , 1, 2021-08 | Google (account verification), 1, 1, 2022-05 , , 2, 2022-07 GroupMe, 1, , 2022-06, , ,  | 
Some companies maintain secret lists of phone numbers which they prohibit for new signups. If you run into this problem, you can:
- try again (sometimes this solves the issue)
 - contact the company, letting them know of the issue
 - use a different form of 2FA, like OTP (since SMS 2FA is neither private, nor is it all that secure
 - find an alternative to that company's services
 - use a service specifically tailored to SMS 2FA instead, like https://crypton.sh/ or https://smsprivacy.org/ [SMS Privacy appears to no longer be operational] (their numbers are not on these block lists, but they lack certain other features of a JMP phone number)
 
Sample of services with successes and failures:
