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② 後台搜尋「Fast2SMS – OTP Login & SMS Notifications」→ 直接安裝（推薦）
原文外掛簡介
Add OTP login, WhatsApp and SMS order notifications, abandoned cart recovery, COD verification and bulk campaigns to WordPress and WooCommerce with the official Fast2SMS plugin.
The plugin is completely free. Bring your own Fast2SMS API key — messages are billed to your own Fast2SMS wallet at your account rates, and delivery reports stay in your own Fast2SMS panel. No monthly fee, no per-site licence.
WooCommerce automations
Order placed, payment received, order completed, cancelled, refunded
COD order alerts + one-tap COD OTP verification link (reduce RTO)
Abandoned cart recovery with configurable delay
SMS, WhatsApp, or both per event — pick approved DLT / WhatsApp templates straight from your Fast2SMS account with variable mapping
OTP everywhere
Login with OTP on the WooCommerce login form and wp-login.php
Phone verification on signup/registration
[fast2sms_otp_login] shortcode for any page or Elementor
OTP verification on Contact Form 7 ([fast2sms_otp] tag), WPForms and Elementor Pro Forms ([fast2sms_otp_verify])
Rate limits built in: per-phone, per-IP, attempt caps and resend cooldown
Bulk campaigns
Send an approved template to all customers, all users, or a pasted/CSV list
Queue-based sending with automatic retries and full logs
More
Wallet balance and SMS count in the dashboard header
Admin SMS/WhatsApp alert on form submissions
Low-balance email alert
Message logs with masked phone numbers
Phone numbers and API key encrypted at rest (AES-256-GCM), automatic data retention purge
Works without WooCommerce too — OTP login, form OTP, form alerts and campaigns run on plain WordPress. WooCommerce-only features light up automatically when WooCommerce is installed.
Requirements
A free account at fast2sms.com with your own API key
For SMS: approved DLT templates in your Fast2SMS panel
For WhatsApp: approved WhatsApp templates in your Fast2SMS panel
For OTP: an OTP ID created in your Fast2SMS panel (Smart OTP section)
Target market: India (10-digit Indian mobile numbers)
Guides & documentation
Complete setup guide — every feature, step by step
OTP login for WordPress and for WooCommerce
SMS & WhatsApp order notifications and WhatsApp-only setup
WhatsApp OTP with SMS fallback
DLT registration explained for store owners
Bulk SMS campaigns from WordPress
WhatsApp Business API setup
External services
This plugin connects to the Fast2SMS API (https://www.fast2sms.com) to send SMS/WhatsApp messages, send/verify OTPs, fetch your approved templates and read your wallet balance. Your API key and the recipient phone numbers of messages you configure are sent to Fast2SMS for this purpose. See the Fast2SMS privacy policy and terms.
