A device such as a smartphone may communicate with a server or other network entity using encrypted communications, making it difficult to examine such communications for purposes of identifying communication issues that may affect user QoE (quality of experience). In certain embodiments, an application may be modified to log communication data before encryption and after decryption. For example, the application program may be decompiled and logging instructions may be inserted before portion that result in data encryption and after portions where received data is decrypted. The modified application program may then be recompiled and executed on a device to produce an unencrypted log of data. In other embodiments, elements of the device operating system may be modified to log data before encryption and after decryption.