Crank it up i say! If it breaks get a new one! I bet by the time (if) it does break there'll be a better phone out by then anyway? I hate to say this but it is only a phone? My n900 is awsome but as a phone its useless. The amount of bugs on incoming calls is unexcepable in this day and age and because i'm with voda, making a call is just as bad. I see my n900 as a little computer and i won't loose any sleep over it if it dies. I'm overclocked up to f**k and i can't go back to how slow and juddery it was at stock. Its as smooth as a babys butt now. I believe there's another phone out there (HTC i think) with the same processor runnin 803Mhz or summot? If thats true I'm sure its completly safe to run ours at 800Mhz - 900Mhz.