The SMS resource library

Your next SMS answer is here.

Start with a plain-language answer, follow a setup guide or investigate a delivery result. Find the right path through SMS products, developer documentation, explained articles and tools.

Browse SMS FAQs Open the complete SMS guide

Choose the right SMS workflow

Start with the job you want to complete.

Send from an applicationBuild notifications and updates from a product event.Run an audience campaignConnect contacts, content, consent and campaign progress.Receive and act on repliesConnect inbound SMS to a service or conversation.Verify a phone numberUse a managed verification workflow for one-time codes.

Build and test the integration

Understand the sender and destination before your first send.

SMS overviewFind the complete sending and receiving guide.Send SMSBuild the request, configure the destination and test delivery outcomes.Choose and register a senderUnderstand sender identity and per-country requirements.Use a system templateSend with a built-in template and its required variables.Connect an AI agentSet up the CLI or MCP for your agent.Verify and consume webhooksHandle signatures, retries and event identity.

SMS, explained

Plain-language answers before implementation details.

SMS API or SMS gateway?Understand the terms behind a sending integration.What is bulk SMS?Distinguish an audience send from individual messages.One-way or two-way?Choose whether recipients need a reply path.Which sender type should I use?Compare the identities people see on their phones.Explore all SMS answersBrowse the complete library of durable SMS explanations.Product FAQsFind answers grouped by the capability you are evaluating.

Prepare the message

Make encoding and segmentation a visible part of the review.

Create campaign contentDraft, personalize and review reusable messages.Character limitsRead the limits for GSM-7 and Unicode messages.Smart encodingUnderstand substitutions and preservation of original text.SMS segment calculatorInspect a draft’s encoding and segment boundaries.What is an SMS segment?See why a single visible text can contain several billable parts.Multipart messagesUnderstand how several segments become one text on a phone.

Investigate delivery and replies

Move between aggregate performance and an individual message.

SMS message logInspect status, sender, recipient, segments and timeline.SMS event catalogueUnderstand accepted, sent, delivered, rejected and received events.Dashboard metricsRead delivery rates, failures and latency with their definitions.SMS Stats APIQuery counts, dimensions and time buckets.What does a receipt prove?Understand a carrier delivery report and its limits.Investigate carrier filteringReview sender, content and sending patterns when delivery fails.

Numbers, destinations and consent

Prepare the identity, market and customer permission together.

Numbers and sender IDsCompare sender choices for different uses.Destination catalogueCheck sender support and requirements by country.US 10DLC registrationRegister a brand and campaign for US long-code messaging.Opt-outs and keywordsRead coverage, automatic replies and suppression behavior.Campaign review controlsConnect consent, registration and current eligibility.SMS pumpingRecognize abuse that can drive unwanted messaging traffic.

Move an existing SMS integration

Keep your application’s intent while changing the provider.

SMS migration overviewPlan the differences in authentication, senders and event handling.Migrate from TwilioMap sending and delivery events to Bird.Migrate from SinchReview send and batch differences.Migrate from TelnyxAdapt sender and webhook integration.Migrate from InfobipMove sending and outcome handling.Migrate from PlivoMap your application’s message workflow.Migrate from BandwidthReview API and event changes.Move from the Connectivity PlatformFollow the path from the earlier MessageBird integration.

Evaluate the fit

Connect the technical decision to destinations, cost and rollout.

SMS pricingRead published rates and the destination factors that affect cost.Compare SMS providersEvaluate the capabilities your integration requires.Getting startedFollow the setup sequence for an initial integration.Campaigns and broadcastsChoose the workflow for a coordinated audience send.

Put it into practice.

Continue with the documentation, guides and examples for this topic. Resources are in English.

Follow the learning pathBuild your first integration Explore the capabilityExplore the SMS platform

Turn the answer into a working integration.

Create a workspace and prepare your sender, destination and first test. For a campaign or a more complex rollout, bring your requirements to an SMS specialist.

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