Using a mobile phone while driving is **prohibited in Spain** due to the high risk of distraction that can cause accidents. However, its use is allowed through a **hands-free device** that does not require touching the screen or using headphones. This is because, although the hands-free device can also be distracting, it is less dangerous than holding the phone with your hand or shoulder.

- **Distractions when using the mobile phone**: When you use the mobile phone, you may pay more attention to the conversation than to the road, misjudge distances, and miss important signals. Additionally, handling the steering wheel with one hand is more difficult and can lead to leaving the road or invading opposite lanes.

- **Recommendations**: If you need to make a call, it is best to stop the vehicle in a safe place. If you use a hands-free device, keep conversations short and inform the other person that you are driving.

- **Specific prohibitions**: It is prohibited to use headphones connected to the mobile phone while driving, as this can isolate you from traffic sounds and increase the risk of accidents. Only some specific headphones are allowed on motorcycles and mopeds.

Therefore, the only permitted way to use the mobile phone in a traffic jam is with a hands-free device that does not require headphones.