Recently bought a new mobile working on o2 pay as you go..The phone is a nokia 6230i and is very nice but every time i end a call or send a text i imediatly recieve a text informing me of my remaining credit.I dont mind getting message as i got it on my old phone but my old phone displayed message without any noise.My new phone displays message after making my message alert tone.Does anyone know how to stop this without turning off message alert tone completly...