T-mobilitat cards use NFC (Near Field Contact) technology, which is based on low-power waves that, as the name suggests, require close proximity. In this article, we offer some tips to help you perform readings more effectively.
First of all, you should know that when reading a T-mobilitat card, the TMB App connects to the T-mobilitat system to decrypt the data stored on the card. If you experience reading issues even after following the tips provided, it may be due to connection problems. In that case, the best option is to wait a moment and try reading the card again.
 

In most cases, the NFC antenna on your device is already activated, as it’s used for functions like mobile payments. If it’s not activated, you can enable it from your device’s Settings menu.

On iPhones, due to stricter security linked to NFC, the antenna activates automatically when needed. So you don’t need to worry about this.
 

Card reading is done through the NFC antenna in your phone. This antenna is located in a specific spot, so the area where you place the card is important:

• The antenna is usually located at the top of the device.
• If you’re using an Android Device, place the card on the back of the phone.
• If you’re using an iPhone, you can place the card on either the front or back of the phone.

Each device model may vary, so we recommend testing to find the best spot for detection. Once you’ve located it, reading the card will be easier.
 

You’ll know the card has been detected when the screen displays a message. Once it’s detected, keep the card as steady as possible until the reading is complete and the information appears on screen.

DDTags are optical codes that contain information (similar to QR codes). Their advantage is that they can be read from a greater distance and at different angles.

DDTags are a technology developed by Neosistec, used to guide visually impaired people through the Navilens app. In addition to navigation, this technology can provide valuable contextual information, which is why Navilens is used not only in public transport but also in other sectors such as museums, product packaging, and more.

The TMB App uses DDTag codes placed in Metro stations and TMB bus stops to help you more easily find information about stops and stations (metro and bus waiting times, services, schedules, access points, etc.).
You should know that code reading is generally fast, but on iPhone devices it tends to be faster than on Android devices 

On the home screen, you can access the DDTag reader via the color code icon located on the right side of the screen. When you open it, simply point your camera at the code to read it.

You can also use DDTag scanning in the TMB App’s search tools to find a station or stop, or to set it as the start or end point of a planned journey. Just click in the search field and choose the DDTag reading method from the options shown below.

No. The TMB App uses these codes specifically to quickly locate TMB stations and stops. If you scan a code that doesn’t correspond to a TMB location, the app won’t return any results.
 

The TMB App uses the codes to speed up the search for stations and stops—it doesn’t read the actual content of the code. That’s why all codes located in the same Metro station will always take you to that station’s screen.

If you need help navigating the network, you can use the Navilens app for that purpose.
 

The reading feature requires a connection to the systems that provide this information. If you experience connection issues, it may be due to a temporary system problem or lack of internet access. We recommend trying again after a few minutes.