basic smart phone (st pancras N1C)

I have a sim card from vodafone which has unlimited minutes, texts and 40gb of data free for 6 months, I just require a device to put it in. Please if you have a phone just sat in a drawer I would really appreciate it, it doesn't need to be the most high-tech - just operate whatsapp and youtube as well as being able to access emails. I usually stay in St Pancras overnight and can meet anywhere around there.