Every SMS gateway I have tried has the same problem. Messages go out from a five-digit shortcode. The recipient does not recognise it. Open rate drops. Reply rate drops harder.
I did not want that. I wanted the customer to see my actual phone number, the one they already have saved. So I built EchoCue.
EchoCue lets you send SMS from your own phone number using your own SIM. No third-party carrier. No per-message markup. The message leaves your handset, arrives from your number and shows up in your phone's normal Sent folder.
This post is the setup, end to end.
What you need
- An Android phone with an active SIM
- A free EchoCue account at echocue.com
- The EchoCue Companion app installed on that phone
That is it. No Twilio account. No number provisioning. No shortcode approval. If your phone can send an SMS to a friend right now, EchoCue can send it programmatically.
Step 1. Create an EchoCue account
Go to echocue.com/register.html and sign up with email and password. No card required for the Free tier.
Free gives you one paired device and 10 SMS per month, which is enough to test everything in this post.
Step 2. Install the Companion app on your Android phone
Download EchoCue Companion from the Play Store on the phone you want to send from. This is the phone whose number will show up on your customer's screen. Sign in with the same email you used on the dashboard.
The app needs two permissions to work:
- Camera, to scan the pairing QR code
- Notifications, so the backend can push send jobs to it
Grant both. If you deny notifications, the phone will not receive send requests reliably.
Step 3. Pair the phone
On the web dashboard, open Devices and click Add Device. A QR code appears.
Open the Companion app, tap Scanner, and point it at the QR on screen. The app registers the device in EchoCue.
The device now shows in the dashboard with its phone number, model and online status. You can pair more than one, up to your plan limit.
Step 4. Send your first SMS from the dashboard
From the dashboard, click Compose. Pick the device you just paired, enter a recipient number, type a message, hit Send.
The backend pushes the job to the phone. The Companion app receives it and the SMS goes out through your carrier the same way it would if you typed it yourself.
The recipient sees your number. Not a shortcode. Not an alphanumeric sender ID. Your number.
Step 5. Send SMS from the API
The dashboard is fine for one-off sends. For anything real, use the REST API.
Every account, including Free, gets an API key and secret. Find them in Settings → API.
Send a message:
POST https://api.echocue.com:5501/v1/message/send
Authorization: Bearer
Content-Type: application/json
{
"device_guid": "abc-123-your-paired-device",
"to": "+18765550100",
"channel": "sms",
"message": "Reminder: your appointment is tomorrow at 2pm."
}
You get back a message ID and a status. Delivery updates arrive on a webhook you register, or you can poll the status endpoint.
Same auth model, same request shape, whether you send one message or ten thousand.
Step 6. Wire it into Google Calendar (optional)
If you are sending appointment reminders, do not build the scheduler yourself. Connect Google Calendar in the dashboard, and EchoCue reads your events and fires an SMS at whatever offset you set (24 hours and 1 hour before is a common combo).
This is the workflow I use for salons, clinics and pharmacies. The business runs their calendar the way they already do. Reminders go out from their own number. No-shows drop.
What it costs
The SMS itself uses your carrier plan, so cost per message is whatever your plan charges for SMS. In most places that is zero if you have unlimited SMS, or a few dollars (or cents) metered.
EchoCue's fees:
- **Free:** $0/mo, 1 device, 10 SMS/mo, full API access
- **Starter:** $9.99/mo, 1 device, unlimited SMS
- **Growth:** $29.99/mo, 4 devices, unified inbox, unlimited WhatsApp
- **Scale:** $99.99/mo, 12 devices, 10 team seats
For comparison, Twilio charges roughly $0.0079 per SMS in the US on a rented long code. For a small business sending 3,000 reminders a month, that is around $24 in SMS fees, plus number rental, plus 10DLC registration.
Limits worth knowing
- SMS sending is Android only. iOS locks down programmatic SMS, so an iPhone cannot act as a sender. The dashboard and unified inbox work on any device with a browser.
- The phone has to be online. If the SIM has no signal or the phone is off, jobs queue on the backend and send when it reconnects.
- Carrier throttling still applies. Most consumer plans start flagging around a few hundred SMS per hour. If you are pushing volume, spread across paired devices.
- Two-way SMS works. Replies come back through the app, into the unified inbox and hit your reply webhook if you have one wired up.
Why bother
Because a message from a real number gets opened. That is the whole thesis. Every gateway tool competes on price per message. EchoCue competes on the message actually working.
If you want to try it, the Free tier is enough to send an SMS from your own number end to end without spending anything. Start here: echocue.com.