Better signal on the phone
I've recently seen that you can buy a 4g antenna to make the signal on your phone better. I think that very many recognise it when you're sitting in the train and the signal is very bad and you can't do anything. But with this antenna the signal will get better. The antenna catches up the signal and makes it stronger so that your phone can recieve the signal better. It's a great invention I think. Now I won't have to worry about the signal getting bad on the train.