Many ppl complaints about their Hero freeze when u try to delete large threads of messages. My Hero also died and i had to turn it off. But then i found the solution: 1-Download SMS quick delete 2- Turn off the screen lock function, (so that ure screen always is on) 3- Open Sms Quick delete, find the thread u wanna delete, open it and select all and delete! 4- Do NOT lock ure screen, just let the app do its work. 5- If the countdown thingy goes away, dont worry, cus the program is still working. If someone calls u during delete just open the program again and see that the msg u r deleting is still going, it will! U dont have to open thread to see that, just watch the sms number! Its a very slow process but for me it was the only way. It deletes 10 msg a min! So 1 hr is 600 sms! But when u get down to around 600 msg left the prosess speeds up, but if u have like 4000 msg in a thread its around 10 sms a min! Important: NEVER lock ure screen, then the prosess will pause! Sorry my english but hope u understand and will find this usefull!