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US carrier registration
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Guide to US carrier registration for OpenPhone customers
The major US carriers (AT&T, T-Mobile, and Verizon) are taking collective action to protect their customers from today's over...
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US carrier registration for businesses without an EIN or equivalent tax ID number
If you’re a business (sole proprietor) or solopreneur without an EIN (or another form of business ID if you’re based outside...
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How to complete US carrier registration for businesses with EIN or other tax identification numbers
The major US carriers (AT&T, T-Mobile, and Verizon) are taking collective action to protect their customers from today's over...
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Tips for successful A2P registration
In order to text US phone numbers from OpenPhone number, you have to register your number through the U.S. carrier registrati...
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