What do you do with a old mobile when you buy a new?

Funny sequence of events. I bought my new mobile in Sept and couldnt trade my old Nokia as it refused to switch on!! I kept it in my bag for 2 months and then I met Becky - my fiance. We stay in different cities and to cut on phone calls I put an airtel add-on sim card and a new battery on it and gave it to her - now we talk at 10 paise per minute and it feels too cool!! Thank God the old Nokia didnt work when I went to trade it!!

I've heard the strangest thing: if you bury your old mobile in your backyard where there's alot of sun, plants especially sunflowers will be attracted to grow on the spot. I don't care if it's true or not but I will bury that useless thing either ways.(very old model)

Yup either trade it in and get some money reduced off the new phone or I will keep the old one as a spare and use the new one as my main phone.

i keep it, use it as a spare phone, usually my brother will sell it for me. but then if i dont need cash, i will have to keep it first.

I will exchange it in the shop and accept some reduction for the new one..