My favourite piece of technology

I have a love-hate relationship with technology. I think is a very powerful tool for people's life, but I really don't like hyper people. 
My favourite piece of technology is my cellphone, which was a gift from my friend Maria Ester. She gave it to me when she moves from this to another more modern, two months ago. I used every day, specially for three things: whatsapp, twitter and e-mail. Is useful for keep in touch whit my friends and family, and definitely very cheap.
My life would be different without my cellphone, for example, since I had whatsapp, I talked to friends not seen for a long time. That's was nice, but also kind of weird, because people should be friend whit or without technology.