Research and practical guidance for teams buying, selling and integrating SMS capacity.
RSS
An operational guide to designing repeatable A2P SMS tests, recording technical evidence, and comparing routes without confusing DLRs with delivery observed on a handset.
Read article
An operational guide to distinguish connectivity, acceptance, reported delivery, callbacks, and actual handset receipt; segment impact, mitigate in a controlled way, and escalate with useful evidence.
Read article
Prefixes help interpret a number, but they do not confirm the routing information currently applicable to a ported subscriber. This guide outlines an A2P routing policy based on signals, local requirements, and operational evidence.
Read article
A robust A2P SMS routing policy turns compliance requirements, traffic profile, quality evidence, capacity, and cost into reviewable rules by destination. This framework helps select, monitor, and switch routes without confusing a DLR with a universal guarantee of handset receipt.
Read article
An operational guide to calculating TPS, sizing queues, separating priorities, and testing A2P SMS sending capacity without confusing acceptance, DLRs, and final delivery.
Read article
Learn how to estimate SMS segments from the final text, encoding and concatenation method. Includes formulas, examples and controls for HTTP API and SMPP.
Read article
An operational guide to correlating submissions, DLRs, and independent observations, classifying discrepancies, and escalating incidents with reproducible evidence—without presenting DELIVRD as proof that a message was read.
Read article
An operational guide to handling timeouts and ambiguous SMS outcomes without turning a technical retry into a second message. Includes idempotency keys, persistent states, reconciliation through callbacks or DLRs, and OTP-specific controls.
Read article