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SMS Guidelines for Slovenia: Compliance, Message Delivery, and Technical Specifications

When sending SMS messages to Slovenia, it's crucial to follow specific guidelines to ensure compliance and successful delivery. This guide provides a detailed overview of the technical and legal considerations for SMS messaging in Slovenia, including support for two-way messaging, concatenated messages, and compliance best practices.

Key Technical Specifications

Two-Way SMS Support

Two-way SMS is not supported in Slovenia. This means users in Slovenia cannot reply to SMS messages sent from your system.

Number Portability

Slovenia supports number portability, allowing users to retain their mobile numbers when switching between mobile networks. This feature is essential for maintaining contact with users who may change providers.

Concatenated Message Support

Slovenia supports concatenated messages. If your message exceeds the character limit for a single SMS (which varies based on character encoding), it will be split into smaller segments. These segments are rejoined at the recipient’s device, ensuring the message is displayed as a single, coherent text.

Note: For certain sender ID types, concatenated messages may not be supported. The way messages are split and rejoined can also vary depending on the encoding used.

MMS Support

Multimedia Messaging Service (MMS), which allows sending pictures and videos, is not fully supported in Slovenia. Instead, MMS messages are converted into SMS with an embedded URL linking to the multimedia content.

Sending SMS to Landline Numbers

In Slovenia, sending SMS to a landline number is not allowed. If you attempt to send an SMS to a landline, the Sent REST API will return a 400 error with code 21614. The message will not be logged, and your account will not be charged for the failed delivery.

Compliance Considerations

Compliance is critical when sending SMS, particularly in Slovenia. Here are some best practices to follow:

  1. Opt-In Consent: Always obtain opt-in consent from users before sending them any communication, especially for marketing or non-essential messages.

  2. Respect Daytime Hours: Only send messages during the recipient's local daytime hours unless the message is urgent. This helps avoid disturbing users during inappropriate times.

  3. Support HELP/STOP Messages: Your SMS campaigns should support standard commands like HELP and STOP, and these responses should be in the local language to ensure clarity for the recipient.

  4. Do-Not-Call Registries: Avoid contacting users who are listed on do-not-call or do-not-disturb registries. This is crucial for maintaining compliance with local regulations.

Conclusion

When sending SMS messages to Slovenia, it’s essential to understand the technical limitations and compliance requirements. While features like concatenated messages and number portability are supported, two-way messaging and SMS to landline numbers are not. Always ensure that your campaigns are compliant with local regulations by obtaining consent and respecting local communication norms.

By following these guidelines, you can improve your SMS delivery success and maintain a positive relationship with your audience in Slovenia.

For more information on SMS regulations in Slovenia, you can visit the Slovenian Communications Agency for official guidelines.