A smartphone is a portable device combining functionality of many solid-state everyday life tools in one unit, including digital camera, camcorder, flashlight torch, music player, book reader, web browser, messenger, radio, environmental sensors like air pressure, and more. The functionality varies among models.
Supplementary to the Wikipedia article, this resource documents tips and guides on usage.
Charging port careEdit
To prevent unnecessary wear on the charging port, connector, and cable endings, grab the handle and not the cable. The two handles are between cable and the metal pieces that enter the port. Push or pull the connector perpendicularly to the charging port without applying sideways pressure that could wear down the connector and port faster.
Slightly and alternatingly moving the connector sideways in parallel to the USB connector's flat surface (longer edge, horizontally to the charging port) is harmless and could facilitate connecting and disconnecting, whereas downward pressure (vertically to charging port against the connector's longer edge) is unhealthy for the connector endings and should be prevented.
Wearing down the charging port can be limited through wireless charging. While more convenient, it is slower and produces more heat than wired charging due to the lower efficiency of wireless power transmission. As such, wired charging is more suitable in a hurry.
Battery care is of increasing concern as a result of the popularization of designs that deny its replacement, typically the shortest-lived component of the unit.
Signs of an expiring phone battery are quick battery drain and system outages caused by voltage starvation.
In order to delay the battery expiry, stress to it needs to be limited by foregoing fast charging to the extent possible, as it causes heat that stresses the battery, and the operational battery capacity needs to be limited to a centered range between approximately 25% and 75%, as too high and too low charging states wear it down faster. If no automated process is able to limit the charging state, the power needs to be disconnected manually at a charging state of around 70 to 80 percent, as well as be recharged in time to prevent drain below 20%.
Possible measures to reduce power consumption include deactivating connectivity features such as WiFi and Bluetooth when unneeded, and monitoring background apps' activity. Note that some tasks such as using cellular internet and high-definition video recording inevitably consume much power. Consider bringing an external battery bank ("power bank") with you.
It is recommended to use both a protective case and a screen protector. Even cheap ones provide significant protection compared to none, and are far cheaper and easier to replace than built-in smartphone parts should damage occur.
Smartphone cases may be equipped with useful features such as a kickstand.
Using a cable with low electrical impedance (resistance) may speed up charging. Cables rated to support higher currents such as 5 Amp. have thicker copper wires, thus less resistance. Longer cables (e.g. 3 metres) tend to have a higher resistance, though the thickness of the copper wires plays a more important role.
Charging protocols using elevated voltages are likely compatible with existing USB cables and don't mind long cables, but produce more heat in the end device due to necessary internal voltage downregulation.
Charging speed can be verified using a USB multimeter as depicted.
It is recommended to film horizontally and to avoid rotating the unit while recording.
Filming horizontally is recommended as the resulting footage will gracefully fill computer monitors' and televisions' screen surface, whereas vertical video appears as a slit.
Vertically filmed footage would need to be cropped or zoomed in to fill the entire screen, not only resulting in a lower-resolution crop of the video, but depending on video players' capability to do so during playback. Cropping in a video editor either requires time-taking rendering to a separate video, or sufficient processing power for real-time playback.
Orientation should remain constant throughout recording, as filming in a different orientation than when recording was initiated results in a misrotated picture. Counter-measures such as correcting rotation using metadata from the accelerometer or gyroscope have not been implemented as of 2021, and early future implementations might be proprietary (closed-source), thus not widely supported among video players.
Some camera software locks the rotation of the user interface elements while filming or warns the user about rotation.
Decisions after purchaseEdit
You may wish to unlock the smartphone's bootloader in order to be able to "root" the device for administrative tasks such as creating full backups and advanced modifications. However, this may void the warranty. It is recommended to make that decision soon after purchase, as switching the bootloader state may require a full erasure of user data, which becomes increasingly difficult to back up with accumulation over time.
It may be necessary to install multiple apps with a similar purpose, such as file managers, as they functionally may complete each other.
Depending on implementation screenshots may be captured with a short press or an approximately second-long hold of a button combination. The former is preferable, as accidental shots are better than missed shots. Accidental ones can simply be deleted if desirable, whereas missed ones can not simply be recreated.