What is Unicode
Ever wondered how a text message in Hindi, an emoji, or a Japanese character all show up correctly on a phone screen anywhere in the world? That’s Unicode – the universal character encoding standard that assigns a unique number to practically every letter, symbol, and script humans use, from Tamil to Traditional Chinese to the laughing-crying emoji. Without it, every device, app, and messaging platform would need its own patchwork of encodings, and text would turn into garbled boxes the moment it crossed borders.
How does Unicode work
Every character Unicode recognizes – the letter ‘A’, the Devanagari अ, or 🔥 – gets a unique code point, a kind of ID number like U+0041 or U+1F525. There are over 149,000 code points covering more than 150 scripts, so one standard can represent English, Hindi, Arabic, Tamil, Chinese and emoji without any of them clashing. To actually store or send that code point, it’s encoded into bytes using a scheme like UTF-8 (the most common one on the web) or UTF-16 – UTF-8 uses just one byte for basic English letters and more bytes for complex scripts or emoji, which keeps things efficient. Before Unicode, every language had its own encoding, and text would turn to gibberish the moment it moved between systems that didn’t agree on the same one. It’s also why Unicode matters for SMS – it’s what lets a text carry Hindi, Tamil, or emoji content at all, though as covered in our SMS Character Limit entry, using it shrinks your per-message limit from 160 to 70 characters.
How OneXtel helps with Unicode messaging
OneXtel’s platform and Aura REST API are built to handle Unicode natively, so you can send messages in Hindi, Tamil, Bengali, Marathi, or any other regional Indian script – plus emoji – across SMS, WhatsApp, RCS, and other channels from a single integration. Before you hit send, the platform shows you the character and segment count, so you always know when Unicode content is about to shrink your SMS limit from 160 to 70 characters, instead of finding out after a longer bill arrives. Because DLT regulations in India require every SMS template to be pre-registered, OneXtel also handles entity, Sender ID, and template registration during onboarding – including templates written in Unicode or regional languages – so your multilingual campaigns stay compliant from day one rather than getting stuck at the carrier level.
Why it matters
India alone has over 20 official languages and dozens of scripts, and your customers expect to read messages in their own language, not transliterated English. Unicode is what makes that possible at scale – it’s the reason a Malayalam order confirmation, an Arabic OTP, or a French customer support reply all render correctly no matter what phone or device someone’s using. For businesses sending high volumes of SMS, WhatsApp, or RCS messages, understanding Unicode isn’t just a technical detail – it directly affects cost (via the 70-character segment limit), template approval under DLT, and whether your message shows up as intended or as a string of question marks and boxes.