Insights & guides
8 articles

Author name: Wilham Opoku-Danquah

How-To Guides
Code editor showing Arkesel SMS API POST request with JSON payload flowing to a mobile phone displaying delivered messages — representing API-driven SMS integration

How to Send SMS via the Arkesel API: Developer Guide with Code Examples

You need to send SMS from your application — OTP codes, order confirmations, marketing campaigns. The Arkesel SMS API lets you do it with a single HTTP request. No SDK required. Just standard REST from any language. This guide walks you through authentication, sending your first SMS via the Arkesel API, handling errors, and scaling […]

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SMS Marketing
SMS character limit comparison: GSM-7 encoding fits 160 characters per message while Unicode (UCS-2) fits only 70, shown as two phones side by side.

SMS Length & Unicode: Character Limits Explained (2026)

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 message length suddenly drops, why one emoji turns

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How-To Guides
Sending bulk voice messages to customers across Ghana with Arkesel Voice SMS

How to Send Voice Messages to Customers at Scale in Ghana

You need to reach hundreds or thousands of customers with a spoken message — a promotion, a payment reminder, or an announcement in the language they actually speak. Dialing each number by hand is impossible, and a written text leaves out anyone who can’t read it comfortably. This guide shows you how to send bulk

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