What are Flash SMS and how do I use them?
In this article:
- What are Flash SMS?
- What to use Flash SMS for?
- Sending Flash SMS in the webapp
- Sending Flash SMS via HTTP API or Email2SMS
- No sender names for Flash SMS in newer devices
- Flash SMS on iPhones
- Flash SMS on Android devices
- Flash SMS do not arrive at recipient's phone
What are Flash SMS?
Flash SMS (sometimes also called Flash Messages) are a special kind of SMS. They are displayed directly on the recipient's screen without the recipient having to open them. Usually, mobile phones can neither save these messages (with exceptions) nor send them themselves. However, there are apps that allow you to send them.
What to use Flash SMS for?
Flash SMS are ideal for emergency notifications, for example. Using this type of SMS to send advertising is not recommended. On the one hand, these kind of messaged are particularly intrusive, and on the other hand, your customers will not be able to revisit the SMS if they did not have the time to look at your offer at the time of receipt. Here, regular SMS are usually the better choice.
Sending Flash SMS in the webapp
If you want to send Flash SMS, you can select the type Flash SMS in the function menu to the right of the input field at the top of the webapp.
Sending Flash SMS via HTTP API or Email2SMS
Of course you can also send Flash-SMS via HTTP API and Email2SMS. You can find the respective parameters here:
Flash SMS via HTTP API
No sender names for Flash SMS in newer devices
Please note that sender IDs for Flash SMS are no longer displayed on many new devices. Any sender ID set are replaced by these cell phones with neutral names such as "SMS", "Class 0 SMS" or simply "SMS Message".
This is a reaction of the manufacturers to phishing via SMS. Since Flash SMS messages look like a system message on many devices, this is supposed to prevent consumers from falling for scammers who misuse the sender ID to disguise their message as an official message.
Flash SMS on iPhones
Under certain circumstances Flash SMS can be displayed incorrectly on iPhones: here Flash SMS are received as normal SMS when the screen of the device is locked. Apple is aware of this bug, but has not fixed it yet (as of July 2021). We will make a note here when the normal reception of Flash SMS on locked iPhones is possible again.
Flash SMS on Android devices
Not all Android devices display Flash SMS in the same way. However, it is likely that Android devices do not display Flash SMS in the lock screen. Instead, the message might show as a Flash SMS after unlocking the device or as a regular SMS. We have no influence on the way Flash SMS are displayed.
Flash SMS do not arrive at recipient's phone
If your recipients do not receive your Flash SMS, please check the article "SMS has not been received".
If you don't find a solution there that works for you, please contact our support.