If you have any specific questions about the online management or procedure you are carrying out , you should contact the organization with which you were doing it. Consult the web address of the electronic headquarters of the organizations in Catalonia to contact them.
The idCAT Mobile is an identification system that will allow you to carry out most of the procedures and procedures with the Catalan administrations just by indicating your identity document (DNI, NIE...) and your mobile phone. When you identify yourself you will receive a password on your phone and thus you will be able to access the procedure or management.
The steps to follow to use idCAT Mobile:
1. Access the online procedure or management you want to carry out from the website of the responsible body with which you want to carry out the procedure. You can do the procedure from your computer, mobile phone, tablet... but you will need your mobile phone to receive the single-use code.
At the time of identification, the following screen will appear:
2. Indicate the identity document and the mobile phone number with which you are registered on idCAT Mòbil and press "I have idCAT Mòbil, continue".

3. You will receive an SMS on your mobile phone within a few seconds (this code is for one-time use and expires after 10 minutes). If you do not receive the SMS, you will be given the option to have the code sent to you via WhatsApp or a call.
4. Enter the code received by SMS, WhatsApp or call in the "enter the code" section and press "Send".

Once done, you will access the procedure or management with the data you indicated when registering for idCAT Mobile.
5. If the procedure you are carrying out requires a higher level of security, you will be asked, in addition to the code received by SMS or WhatsApp, to indicate the expiration date of the identity document associated with your idCAT Mòbil.
If you want to confirm that your idCAT Mòbil is working correctly, you can try identifying yourself on the e-TRAM test website (the procedures carried out have no legal validity).
Access the Generic Instance from the "Start" button and fill in the data as explained above. At the time of identification, one of these screens will appear:

If you receive the one-time code and can access it, your idCAT Mobile is working correctly?? ??
Yes, applications and websites can use the idCAT Mobile system as a signature mechanism if the service provider develops this functionality. The electronic signatures produced have legal value and are suitable for actions with a medium level of security.
Likewise, it must be taken into account that idCAT Mòbil is an alternative mechanism to the use of digital certificates, which means that the same predefined functionalities cannot be performed, for example, a PDF cannot be signed.
You might be interested in:
- IDCAT Mobile registration (In-person registration, online registration and reasons for registration errors)
- How idCAT Mobile works and possible errors in use
- Differences between idCAT Mobile and idCAT Certified
- Manage your idCAT Mobile (Modification, Disconnection, Suspension...)
- How do I know if I am registered with idCAT Mobile?
- I have doubts about the idCAT Certificate