Hello,
Data loss from phones is very common. Well, a dead phone denies access to all the stored data in addition to restricting you from making regular phone calls. As a dead phone is of no use, but the data stored within it surely important. So first I will suggest you check your mobile phone with the service center and repair it. But, maybe you lose your data in repair.
Thus, if you want to recover your data, I recommend you to contact the data recovery service provider.