Memory in Android devices, Types of memory

White paper Xperia™ T3

Memory in Android™ devices

To use Android devices efficiently, users should be aware of the different types of device memory. This knowledge is important in order to understand, for example, where music, photos and videos are saved; how many apps can be downloaded from Google Play™; and how photos can be copied to a PC.

The below information is also of interest to developers who want to optimise their programs to make the best possible use of the resources in the device.

Generally, all Android devices share the same basic memory setup. What differs is how much memory is available to you via the different types of memory, and whether your device uses an external SD card or an internal memory chip. Any information specific to the particular device model described in this White Paper is noted as such.

Types of memory

The types of memory described and numbered below are consistent with the terminology used in Sony mobile device menus and in other content relating to 2014 Xperia™ devices:

1.Dynamic Memory (also known as RAM) is used by applications that run when the device is turned on. The amount of Dynamic Memory influences how many applications and operating system services can run at the same time. The Android operating system automatically closes applications and services that are not being used.

However, such automatic functionality has limits. For example, if a lower amount of free RAM is available to applications after a new release of the operating system (due to increased capabilities in the system), device speed will eventually be impacted. This is the main reason that a device cannot be indefinitely upgraded to newer releases of Android™.

If you experience problems with RAM, for example, if the device runs slower than usual or if the Home application restarts frequently when you leave an application, you should minimise the use of apps that run all the time. Such apps could include, for example, applications that frequently download social networking service updates. You could also consider using a static wallpaper instead of a live wallpaper.

To see which apps and services are currently active, go to Settings > Apps > Running. You should have at least 50 MB, and ideally 100 MB or more, of free RAM to avoid slowdowns and application restarts.

You should also be aware that if you update the device to a later Android release, the load on the built- in Dynamic Memory will increase due to the addition of more features, as mentioned above. As a result, the device may run slower after an update.

The Xperia™ T3 has about 1 GB of RAM available to the Android OS and applications, of which about 200 MB is already used out of the box.

2.System Memory (also known as “System partition” or “/system”) is used for the Android OS and for most applications that are pre-loaded from the factory. This type of memory is normally locked, and can only be changed through a firmware upgrade. There is usually some free space available in this section of memory. However, since it is locked, you cannot save apps, photos or any other content to this memory. System Memory is reserved for future firmware upgrades, which almost always need more memory than the original firmware. You cannot see or influence the use of this memory.

3.Internal Storage is memory used as” working” memory. It can be compared to the C: drive on a PC or to the startup disk on a Mac.

June 2014

D5102/D5103/D5106 specifications

The Sony D5102, D5103, and D5106 are part of Sony's esteemed lineup of mobile devices, tailored for users seeking a blend of modern technology, stylish design, and practicality. These models, offering a range of features, have made their mark in the competitive mobile market.

First and foremost, the display is a strong selling point for the D510 series. These devices feature a vibrant TFT touchscreen, typically around 4.5 inches in size, delivering crisp visuals and responsive touch interactions. The resolution is optimized for clarity, ensuring text, images, and videos appear sharp and vibrant, making content consumption a pleasure.

In terms of performance, the D5102, D5103, and D5106 are equipped with efficient processors designed for multitasking and smooth operation. With enough RAM to support seamless transitions between applications, these models handle daily tasks effortlessly, whether it’s browsing, gaming, or streaming content. The processing power also enhances the user experience by allowing for quicker load times and improved overall performance.

One of the standout features of these devices is their camera capabilities. With a primary camera that often exceeds 13 MP, users can capture high-quality images with ease. The cameras are integrated with various modes, including HDR and panorama, which help enhance photos taken in challenging lighting conditions. The front-facing camera, suited for video calls and selfies, usually includes features that support beautification and other enhancements.

Battery life is another critical characteristic of the D510 series. Equipped with a reliable battery, these devices offer all-day usage, making them ideal for busy individuals who require their phone to last through extensive use. Fast charging technology ensures that users spend less time tethered to a charger.

The software experience on the D5102, D5103, and D5106 is enriched by Sony's customized interface built on Android. This combination provides a user-friendly interface coupled with access to a vast ecosystem of applications through the Google Play Store.

Additionally, the D510 series includes various connectivity options, including 4G LTE capabilities, Wi-Fi, Bluetooth, and GPS. This ensures that users stay connected, whether at home, at work, or on the go.

Overall, the Sony D5102, D5103, and D5106 represent a harmonious blend of advanced technology, intuitive design, and essential functionalities. These devices cater to a diverse range of users, from casual smartphone enthusiasts to tech-savvy individuals, making them an appealing choice in the current smartphone landscape.