Intermediate guides

ComplianceIntermediateIs it legal to send bulk SMS without KYC?KYC is a duty of regulated financial firms, not of people who send text messages. What the law regulates is consent, content and sender rules, and those fall on you wherever your provider is.3 min readUpdated 21 Sep 2026 DeliverabilityIntermediateAlphanumeric sender ID support by country: the full tableWhere a sender name is delivered as typed, where it must be registered first and where a number replaces it, for all 228 destinations, generated from the same data as our country pages.9 min readUpdated 21 Sep 2026 DevelopersIntermediateSMPP vs HTTP API: which one do you actually need?SMPP is the wholesale protocol between carriers; an HTTP API is what applications should use. Throughput, receipts, retries and operations compared, and when SMPP pays.2 min readUpdated 21 Sep 2026 DeliverabilityIntermediateBulk SMS to Nigeria from abroad: DND, sender ID and priceWhat a foreign sender needs to know about Nigeria: the do-not-disturb registry, sender ID registration with MTN, Airtel, Glo and 9mobile, permitted hours, encoding and the price per message.2 min readUpdated 21 Sep 2026 DeliverabilityIntermediateHow to read sender ID rules before you sendAlphanumeric, numeric, registered: what each rule means for your brand name, why countries differ, and how to plan a campaign that crosses several of them.3 min readUpdated 10 Sep 2026 DeliverabilityIntermediateTwelve reasons an SMS fails, and what the report tells youUnknown numbers, absent subscribers, carrier filters, expired validity: every failure reason in the delivery report, what caused it and what to do next.3 min readUpdated 28 Aug 2026 CampaignsIntermediateGSM-7 vs Unicode: how message length really worksWhy one message costs one segment and another three, which characters switch the encoding, how concatenation works and how to write for a single segment.2 min readUpdated 15 Aug 2026 CampaignsIntermediateScheduling a campaign across time zonesFixed moment, local window or drip: which to use, how zones are resolved from numbers, and what happens at the edges of a window.2 min readUpdated 5 Aug 2026 CampaignsIntermediateMeasuring what a campaign actually didDelivery is not the result. Tracking links, conversions, opt-out rate and cost per outcome, with the numbers worth comparing between sends.2 min readUpdated 20 Jul 2026