How do I purchase a T-10 public transportation card in Barcelona?

If you're planning on using public transportation in Barcelona, purchasing a T-10 card can be a convenient and cost-effective option. Here's how you can purchase a T-10 public transportation card in Barcelona:

• Find a ticket machine at any metro station or TMB bus stop. You can also purchase the card at some newsstands, shops or kiosks displaying the TMB sign.
• Select the language of your choice on the machine. English and Spanish are commonly available, as well as other languages depending on the machine.
• Select the type of ticket you want to buy. In this case, select the T-10 ticket. You can also buy other types of tickets or passes depending on your needs.
• Insert your cash or card, and follow the instructions on the screen to complete your purchase. Be sure to take your card and receipt once you're done.
• Validate your T-10 card before your first trip. You can do this at any metro station or TMB bus stop. Look for the machines with the TMB logo on them, insert your card, and follow the instructions on the screen.

Remember that with the T-10 card, you can use it for multiple trips and for different modes of public transportation within the same zone, including metro, bus, tram, and some trains. Each time you use the card, one trip will be deducted. You can also share the card with others, as long as each person validates their own trip on the card.