Research and practical guidance for teams buying, selling and integrating SMS capacity.
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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.
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An operational guide to calculating TPS, sizing queues, separating priorities, and testing A2P SMS sending capacity without confusing acceptance, DLRs, and final delivery.
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Learn how to estimate SMS segments from the final text, encoding and concatenation method. Includes formulas, examples and controls for HTTP API and SMPP.
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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.
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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.
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