Free SMS Gateway extension integrating kwtSMS with OpenCart 4.x.

Order SMS notifications to customers and admins with per-status custom templates. COD OTP verification at checkout to prevent fake orders. OTP on login and registration for 2FA security. Abandoned cart SMS recovery. Bulk SMS campaigns
to customer groups or custom numbers. Low stock alerts, new customer alerts, review alerts, and return request alerts.

24 customizable message templates in English and Arabic. Phone normalization handles local numbers, Arabic digits, and country code detection. Full SMS log with audit trail and debug logging. Dashboard with analytics and system status.
Daily cron sync for balance and coverage.

7 admin tabs: Dashboard, Campaigns, Settings, Gateway, Templates, Logs, Help.

Requirements: OpenCart 4.0.2.x or later, PHP 8.0+, kwtSMS account (https://www.kwtsms.com)

Features:
- Customer SMS on order status changes (Processing, Shipped, Complete, Canceled)
- Admin SMS on new paid orders and problem orders
- Per-status custom templates with fallback to default
- COD OTP phone verification at checkout
- OTP on customer login and registration
- Abandoned cart SMS reminders (cron-based)
- Bulk SMS campaigns (all customers, customer groups, or custom numbers)
- Low stock alerts (global threshold, once per product)
- New customer, review, and return request admin alerts
- English and Arabic bilingual templates
- Phone normalization and validation per country
- Gateway login/logout with balance, sender IDs, and coverage
- Test gateway with full send pipeline
- SMS and debug logging with filters
- Daily cron sync