Why?

[Chrismike]

Does anyone know why it costs £500 to upgrade from my sim only contract please?

[pgn]

Are you choosing an expensive handset, @Chrismike?

Are you just months into a 12-month contract?

If you just want to change to another SIMO contract, try uSwitch.

Does your MyO2 show you what the charges are for?

If no answer appears, contact O2, all the ways here: Guide: How to find help & contact O2