It is difficult to recover chats or other deleted data from a phone through technical means. Here are a few possibilities: 1. **Phone backup**: If the chats on your phone have been backed up to the cloud (such as Google Drive or iCloud) or on a computer, then you can recover them from the backup. However, if the backup is set to include only recent data, then the deleted chats may not be in the backup. 2. **Third-party recovery software**: There is a variety of third-party software designed specifically to recover deleted data from phones, such as Tenorshare ultimate, Dr.Fone, or EaseUS MobiSaver. These software may be able to recover deleted chats, but the probability of successful recovery depends on the type of phone, operating system, and use of the data after deletion. 3. **Forensic analysis**: If your friend's roommate is engaged in very sensitive or potentially illegal activities, they may need to consult a digital forensics expert or law enforcement agency to help recover the data. However, this is not usually available or affordable to the general public. 4. **The phone's "Deleted" folder**: Some phones, such as Android devices, have a "Deleted" folder that can store deleted files, including chats, for a certain period of time. However, this folder is usually cleared automatically, so it may not be possible to recover deleted data. 5. **Built-in recovery features on the phone**: Some phones, such as Apple devices, have built-in features that can recover deleted data, such as the "Recently Deleted" photo folder or the "Deleted Messages" section in the "Messages" app. However, these features are usually limited to recovering specific types of data and may not be able to recover all deleted chats. **Important Note**: Attempting to recover deleted data through technical means can be complicated and may not be successful. In addition, accessing a phone or data without the user's consent may violate legal and ethical standards. It is better to have open and honest communication with your roommate to discuss concerns about their behavior rather than trying to recover deleted data without their knowledge or consent. A few questions to consider: * Why does the roommate delete chats frequently? Could they be trying to hide something, or is there an alternative explanation? * Are there other signs of suspicious or hidden behavior by the roommate? * Does the friend feel comfortable discussing their concerns directly with the roommate, or should they seek help from others (such as a mediator)? In this case, open communication, trust, and respect must be prioritized, while also considering the rights and privacy of all parties involved.