Documentation
Everything to get you up and running

Functions
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Limiting Checkout Mobile Verification to Specific Products or Categories in WooCommerce
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Automatically Subscribe Ultimate Member Users to SMS Newsletter Upon Registration
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Automatically Send SMS Notifications for Tracking Codes Added by Shipping Gateways in WooCommerce
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How to Customize Username Format in WP SMS Pro for Mobile Registration
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Quick Reply for SMS with wp_sms_render_quick_reply()

Filters
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Limiting Checkout Mobile Verification to Specific Products or Categories in WooCommerce
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Customizing OTP Request Limits (Rate Limiter) in WP SMS
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Customizing Order and Order Item Metadata in SMS Notifications for WooCommerce
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Customizing the Order Items in SMS Notifications for WooCommerce with WP SMS
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How to Customize Username Format in WP SMS Pro for Mobile Registration