The amount of time you can record voice content on an HTC mobile phone depends on the amount of memory the device has at its disposal. As a rule, an hour of voice recording on a mobile phone takes up 5MB of memory. Most mobile phones come with a limited amount of internal memory, but also feature a card slot for installing additional memory. At the time of publication, most HTC devices in production support up to 32GB of expanded memory, which provides a large amount of voice recording time.
Most HTC phones feature a voice-recording application that allows you to produce voice recordings that are stored on the application or can be sent in a Multimedia Messaging Service message using the phone’s messaging feature. You can produce voice recordings with this application by using standard recording controls, such as record, pause and stop and using the phone as a microphone. If using the application to record a voice MMS message, the application automatically stops the recording when the MMS file limit has been reached.
As a rule, voice messages sent as MMS messages are limited to three minutes in duration, but can vary depending on your wireless service provider’s limitations. Standard voice recordings occupy approximately 5MB of memory per hour of recorded content. For example, some HTC phones, such as the HTC Desire, come with 576MB of internal memory, which is enough memory to support about 115 hours of voice recording. Add a 32GB microSDHC memory card to the Desire and you will have enough room for roughly 6,400 hours, or 260 days, of voice recording. These totals assume all of the device’s memory would be used to record voice, which is not practical. However, these figures provide a model for how long you can expect to record voice using your phone. The voice recording application will show you how much recording time you have left any time you begin a new recording.
Some HTC mobile phones, such as the HTC Rezound, come with a large amount of internal memory, which may prove to be enough for your voice-recording needs. Although these devices -- which typically offer 16GB of internal memory -- also support up to 32GB of expanded memory, it is unlikely you will need to use a memory card to record voice content. Most HTC phones do give you the option of storing voice recorded content to the memory card instead of the device’s internal memory.
Like any content you add to an HTC mobile device, voice recordings consume memory, which can lead to an eventual slowdown of the device’s processing speeds if large amounts of recorded content are stored on the phone. If you intend to use your HTC device for extensive voice-recording purposes, consider purchasing a memory card exclusively for voice recordings, which will give you the ability to access the recordings from another device that supports microSDHC memory cards. The precise amount of times afforded by voice-recording applications can vary based on the file type used.