ChatGIf you’re seeing “Unknown Subscriber”, that’s a  network-level error. What “Unknown Subscriber” Means It means the SIM card or phone number isn...

In SMS delivery systems, “Unknown Base Station” usually refers to a network-related anomaly indicating that the sender’s or receiver’s mobile device is conn...

The “Equipment not equipped for SM” error in SMS (Short Message Service) usually means that the mobile device or network element you’re trying to send the m...

The error “Unidentified Subscriber” (sometimes shown as “Unidentified subscriber” or “Unidentified user”) means your phone’s SIM card or number is not recog...

What “Illegal Subscriber” usually means: “Illegal subscriber” is an operator-side rejection that says the recipient’s subscription is not allowed to receiv...

The error “Teleservice not provisioned” (often displayed as “Teleservice 0 not provisioned,” “Teleservice not available,” or “SMS error: Teleservice not pro...

What the message means: “Illegal equipment: IMEI Check failed — IMEI is either blacklisted or not Whitelisted” means the network’s IMEI verification step r...

The error “Handset Memory Full for SMS” (sometimes shown as “Message memory full,” “Cannot receive SMS – memory full,” or similar) means your phone has run ...

When you see an error like “Mobile handset switched off” while sending an SMS, it means that the recipient’s phone is currently unreachable — it’s either po...

The message “Absent subscriber. No paging response via MSC” is a telecom network status or fault indication that typically comes from the Mobile Switching C...