Explained
The questions we get asked most.
SMS
SMS
What is SMS throughput (MPS), and what limits it?
SMS
What is the difference between one-way and two-way SMS?
SMS
When is the best time to send an SMS?
SMS
Why are my SMS messages being filtered by carriers?
SMS
Why do carriers block public link shorteners in SMS?
SMS
Why was my alphanumeric sender ID replaced with a number?
SMS
Why was my toll-free SMS verification rejected?
Build on the same network.
A test API key is yours immediately. Production unlocks when you add a payment method and verify a sender.