Many users complain that they sometimes delete contacts from their HTC phones by mistake if they use some unfamiliar functions. If you are one of them, what can you do to retrieve lost phone numbers? Calm down and don't get mad if you did lose your important contacts list due to various causes. Here I would recommend you Android Data Recovery. With the help of this program, you can easily rescue your deleted data. Before that, do not use your HTC phone, because your original data will be overwritten by the new information.
Attention: Please check whether your phone battery is more than 20% charged.
In this process, a window will pop up to remind you to enable USB debugging. You need to make sure that you have enabled the USB debugging.
When this window appears, you can tick "Contacts" to allow the program scan contacts from your HTC cell phone. If you decide to restore other data you can select the corresponding data type.
Now, you can see there are two modes to scan your phone. One is "Standard Mode". Another is "Advanced Mode". As the suggestion, the first mode will be better.
When the scan process is finished, here are the result. There are some items in the left category. You are allowed to preview the lost contact one by one. Then click 'Recover' to recover data from Android devices.