UK Business SMS: Sender IDs, Opt-Out Rules and Delivery
How to send business SMS in the UK: alphanumeric sender IDs, the MEF SenderID Protection Registry, Ofcom’s anti-scam rules, PECR consent and the soft opt-in, opt-out wording and delivery tips.
How Much Does an SMS Cost? Pricing by Country and Volume
What actually sets the price of a business SMS, why rates differ so much between countries, and how to estimate a campaign’s cost before you send it.
SMS Pumping Fraud: How to Spot and Stop It
SMS pumping turns your OTP form into a revenue stream for fraudsters. Here is how the scheme works, how to spot it early and which controls stop it.
SMS Sender ID Rules by Country: Alphanumeric, Numeric and Registration
Alphanumeric, numeric, short code and toll-free sender IDs explained, plus a country table showing where alphanumeric names are supported and where registration is required in 40 major markets.
SMS API for Nigeria: Sender IDs, DND, Networks and Delivery Tips
What you need to send SMS to Nigeria through an API: registered sender IDs, how DND treats promotional and transactional traffic, the four networks, encoding and a working request.
How to Send SMS From Your App: Node.js, Python and PHP Examples
Copy-ready Node.js, Python and PHP code for sending SMS through the SMS.to API, receiving delivery reports, retrying safely and formatting numbers in E.164.
“Absent Subscriber” and 12 Other SMS Error Codes Explained
“Absent subscriber” means the network knows the number but cannot reach the handset right now. Here is what it and 12 other common SMS delivery errors mean, based on the GSM MAP and SMPP standards, and how to handle each one.
What Is a Text Message API? How It Works, With Code
A text message API lets your software send SMS with a single HTTP request. Here is how it works, with a working curl and Node.js example and a guide to delivery reports.
Free SMS API for Developers: What’s Really Free (and What Isn’t)
Most “free SMS APIs” are free to try, not free to run. This guide explains trial credits, sandboxes, verified-number tiers, SIM-based gateways and email-to-SMS, and the deliverability and legal risks of free routes.
What Does “Invalid Number” Mean in SMS Delivery Reports?
“Invalid number” means an SMS could never reach the destination as addressed. Here are the common causes, how to tell it apart from temporary failures, and how to prevent it with an HLR lookup.