To set a data usage warning

1Make sure that you have turned on data traffic.

2From your Home screen, tap .

3Find and tap Settings > Data usage.

4To set the warning level, drag the lines to the desired values. You receive a warning notification when the amount of data traffic approaches the level you set.

To set a data usage limit

1Make sure that you have turned on data traffic.

2From your Home screen, tap .

3Find and tap Settings > Data usage.

4Mark the Set mobile data limit checkbox if it is not marked, then tap OK.

5To set the data usage limit, drag the lines to the desired values.

Once your data usage reaches the set limit, data traffic on your phone will be turned off automatically.

To control the data usage of individual applications

1From your Home screen, tap .

2Find and tap Settings > Data usage.

3Find and tap the desired application.

4Make the necessary adjustments to change the data usage limit, restrict background data, or restrict all data traffic for the application.

5To access more specific settings for the application, tap View app settings and make the desired changes.

Specific settings for an application may not always be accessible.

The performance of individual applications may be affected if you change the related data usage settings.

Mobile network settings

Your phone automatically switches between mobile networks depending on what mobile networks are available in different areas. You can also manually set your phone to access a particular mobile network type, for example, WCDMA or GSM.

To select a network type

1From your Home screen, tap .

2Find and tap Settings > More… > Mobile networks.

3Tap Network Mode.

4Select a network type.

To select another network manually

1From the Home screen, tap .

2Find and tap Settings > More… > Mobile networks > Network operators.

3When a pop-up window appears, tap Search mode > Manual.

4Select a network.

If you select a network manually, your phone will not search for other networks, even if you move out of range of the manually selected network.

To activate automatic network selection

1From the Home screen, tap .

2Find and tap Settings > More… > Mobile networks > Network operators.

3When a pop-up window appears, tap Search mode.

4Tap Automatic.

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Sony ST26i/ST26a manual Mobile network settings

ST26i/ST26a specifications

The Sony ST26i, also known as the Sony Xperia J, is a smartphone that was released in the latter part of 2012. It was part of Sony’s Xperia series and aimed at more budget-conscious consumers while still providing core features found in higher-end models at that time.

One of the standout features of the Xperia J is its design. The device includes a sleek and stylish exterior with a 4-inch TFT touchscreen display, boasting a resolution of 480 x 854 pixels. This display provides vibrant colors and decent viewing angles, making it suitable for casual browsing, social media, and video consumption.

The Xperia J is powered by a 1GHz single-core Qualcomm Snapdragon S1 processor, which was complemented by 512MB of RAM. While the hardware may seem modest by today’s standards, it was optimized to run the Android 4.0 Ice Cream Sandwich operating system. Additionally, the device was upgradable to Android Jelly Bean, offering users access to improved performance and features.

In terms of storage, the Xperia J comes with 4GB of internal storage, which can be expanded via microSD cards up to 32GB. This allows users to store a variety of apps, photos, and videos without hassle. The device also features a 5-megapixel rear camera with LED flash, capable of recording video in 720p HD. Although it lacks a dedicated front-facing camera, the Xperia J still competes well in its category for casual photography.

Connectivity options for the Xperia J are comprehensive, including 3G, Wi-Fi 802.11 b/g/n, Bluetooth 4.0, and GPS functionality. The phone also packs a decent 1750 mAh battery, providing a day’s worth of usage under moderate to heavy use.

Other notable technologies incorporated in the Xperia J include Walkman features for music playback, which were popular in Sony devices, and the inclusion of Timescape UI, enhancing the user experience by aggregating social media updates.

Overall, the Sony ST26i/ST26a Xperia J offers a balance of design, performance, and essential smartphone features, making it a worthy option for those seeking an affordable device that doesn't compromise on quality. Its combination of user-friendly technology and classic Sony design helps it stand out, appealing to a wide audience looking for an entry-level smartphone experience.