Why can’t my SIM card send or receive SMS messages?

First, make sure you're using the correct format when sending SMS:

• When sending an SMS to a number from another operator, include the full international dialing code with 00 or + (e.g. +39 or 0039 for Italy).
• When sending an SMS to a Things Mobile number, make sure to use +882... or 00882....

If the format is correct but the message is not delivered, try the following steps using a smartphone:

(1) Test sending SMS from Things Mobile to another operator

• Insert the SIM card into a smartphone.
• Enable mobile data and data roaming.
• Set the APN to TM.
• Make sure the SIM card connects to an available network automatically.
• Send an SMS to a number from another operator and check if it’s delivered.
• If not, manually select a different network and try again.
• Repeat with different operators and phone numbers.

(2) Test receiving SMS from another operator to Things Mobile

• Use a phone with a SIM card from another operator.
• Send an SMS to the Things Mobile number.
• If not delivered, try switching to another network and send again.
• Repeat with different operators.

If SMS messages are not delivered or only partially delivered, contact customer support at support@thingsmobile.com with the following details:

• The operator of the number that didn’t receive or send the SMS;
• The operator the Things Mobile SIM was connected to during the test;
• Date and local time of the SMS attempt;
• Any error messages or screenshots, if available.