What are the budget options for registering on a site with a code from SMS?

Question

SMS

For the service, I need to confirm my phone number by receiving SMS and entering a code from there.
Can you tell me how this can be done on a budget? Can you please advise the services through which this is easiest to set up?
Thanks (=

Answer 1

Budget options are a flexible concept, look at the SMS center , there are APIs and ready-made libraries for popular CMS and even a ready-made form for confirming a phone number