After completing your SMS message, adjust your SMS settings before you continue. Here you will find Details, Sender name rules, and Unsubscribe Settings.

Sender name

The sender name is what your recipients see as the source of the SMS on their phone. Go to Settings in the bottom bar and edit the sender name under Sender name.

Sender name rules

Your sender name must follow these rules to be accepted:

Rule	Details
Length	3–11 characters
Spaces	Not allowed
Allowed characters	A–Z, a–z, 0–9
Only numbers	Not allowed — the sender name must contain at least one letter

💡 Tip: Some devices won't display sender names shorter than 3 characters correctly, so always use at least 3.

Sender name troubleshooting

If your sender name isn't working as expected, check the situations below before contacting support.

The Sender name field won't accept what I typed

The SMS tool validates the sender name as you type. If the field is rejected, run through this checklist:

Is it between 3 and 11 characters?
Are there any spaces? Remove them or replace with no separator (e.g. ApsisOne instead of Apsis One).
Does it contain only letters (A–Z, a–z) and numbers (0–9)? Remove any special characters like å, ä, ö, é, &, -, . or punctuation.
Does it contain at least one letter? A sender name of only numbers will be rejected.

Recipients see a number instead of my sender name

This usually means the destination country doesn't accept custom alphanumeric sender names, or your sender name isn't registered where registration is required.

Check SMS Supported Countries to see if the destination requires sender name registration.
In countries that don't support custom sender names, recipients will see a numeric sender instead. This is expected behaviour and cannot be overridden.

My SMS is pending and never delivered

If recipients in specific countries never receive the SMS, sender name registration is the most likely cause.

Countries that require sender registration will hold the SMS as pending for up to 48 hours before it expires.
See SMS Supported Countries for the list, and contact us to register your sender name.
Recipients in countries that do support your sender name will receive the SMS as normal — only the unregistered countries are affected.

The sender name looks different on different phones

Some older devices or carriers truncate or alter how the sender name is displayed. Sender names shorter than 3 characters in particular may not display correctly on some devices. There is no setting to control this on the recipient side — using a clear, 3–11 character alphanumeric name gives the most consistent result.

Recipients reply to my SMS but I don't see the response

SMS sent via Apsis One are one-way. When you use an alphanumeric sender name, recipients cannot reply to the message. If you need two-way communication, include a phone number or link in the message body that recipients can use to get in touch.

💡 Still stuck? Send a test SMS to your own number first (see Test SMS below). If the test works but the real sending doesn't, the issue is most likely country-specific sender registration rather than the sender name itself.

Examples

Sender name	Valid?	Why
`Apsis`	✅	5 characters, letters only
`Apsis2026`	✅	9 characters, letters and numbers
`Apsis One`	❌	Contains a space
`MyCompanyName`	❌	More than 11 characters
`AB`	❌	Fewer than 3 characters
`12345`	❌	Only numbers
`Café`	❌	Contains a special character (é)

⚠️ Note: Some countries require you to register your sender name before sending. See SMS Supported Countries to check whether your destination countries accept custom sender names or require registration.

SMS details

If you added a link to your SMS, the recipients' interactions will be tracked and stored in their Profiles. If you untick the Track links box, Profiles who click the link on their mobile phone — and the corresponding information — will not be a part of the SMS Report.

Unsubscribe settings

For all kinds of communications, your subscribers will have the option to opt out or unsubscribe. Make sure you include the ##Unsubscribe## Data tag in the message.

When a Profile clicks the unsubscribe link in your SMS, the link will lead them to a landing page where they can confirm their wish to unsubscribe. Depending on your settings, you will either display a confirmation message or lead them to a page of your choice.

Under the Unsubscribe tab, adjust the messages, confirmation and design of the unsubscribe page as you prefer.

Preview

Go to Preview in the bottom bar to see what your SMS will look like to your recipients.

Valid Data tags will show with << >> instead of ##, and you will see a sample unsubscribe link.

⚠️ Note: If your data tag is still between ##, go back to the SMS editor and reinsert the tag using the drop-down menu. Click Back on the bottom bar to return to the SMS editor.

Test SMS

Test your SMS before sending it to your recipients.

Click Test in the bottom bar to test your SMS.
Enter the mobile numbers you want to test the SMS on.
Looking good? Click Send in the bottom right corner.
Check the SMS on the test phone to make sure everything looks right.

💡 Tip: Data tags won't show up as intended in the test message, but they will once the SMS reaches the real recipients.

When testing an SMS, you can test the unsubscribe link to make sure it takes you to the unsubscribe landing page and that your settings are correct. You can also click the confirm button on the landing page. Don't worry — since it's only a test SMS, no actions will be recorded and nobody will be unsubscribed.

Ready to proceed? Click Next step in the bottom bar. It is time to choose who to send to.

SMS Settings

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