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When it comes to international messaging, both SMS and messaging apps offer unique advantages. SMS is universal and doesn’t require the internet, making it reliable for basic communication. It's great for sending OTPs, alerts, and updates globally. However, messaging apps like WhatsApp and Telegram offer richer features like media sharing and read receipts. These apps are often free and more engaging for users. The downside is that they need internet access and app installation. SMS works on any phone, even without smartphones. Apps, on the other hand, support two-way conversations and branding. The best choice depends on your audience’s location and device habits. Many businesses now use both for broader global coverage.