i recently went to jailbreakme.com on the iphone 4 and tapped free and cydia began to install and i tapped on the app and it gave me a option to click user,hacker,developer. and i didnt click anything and i got a call and it wouldnt let me answer it and as the call screen was up i received two texts which i couldnt click on . so i held down the sleep/wake button and the home button until it shut off. and i tried turning it back on and it wont go past the apple logo. any help?