Developer Guides

SMS character limit shown across three encodings: a full-length bar for the GSM-7 default alphabet at 160 characters, a shorter bar for the GSM-7 extension table, and a bar under half the length for UCS-2 Unicode at 70 characters, with the cedi sign marked as sitting in neither GSM-7 table.

SMS Length & Unicode: Character Limits Explained (2026)

Developer Guides, SMS Marketing / Wilham Opoku-Danquah

A single SMS holds 160 characters with standard GSM-7 encoding, or 70 characters when it contains Unicode (UCS-2). Anything longer splits into concatenated segments of 153 or 67 characters each, and each segment bills separately. That one rule explains most surprises in SMS sending: why your SMS character limit suddenly drops to 70, why one […]

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Developer Guides

Diagram of multiple scoped Arkesel SMS API keys, one per app, project, and environment, routing from a single secured account to separate integrations

Arkesel SMS API Keys: Manage Multiple Apps & Projects

1 Comment / Developer Guides, SMS Marketing / Joseph Dugu Nartey

Create multiple Arkesel SMS API keys: one scoped key per app, project, or environment. Isolate access, monitor usage per integration, and contain leaks.

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Developer Guides

SMS Length & Unicode: Character Limits Explained (2026)

Arkesel SMS API Keys: Manage Multiple Apps & Projects

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