The S5 Neo supports custom ROMs running Android 11 and 12, but Android 11 is noted for poor optimization and high power consumption.

Devices with Verizon's SM-G900V model have locked bootloaders, complicating custom ROM installations, though some users find exploits to bypass limitations.

Galaxy S5 can run LineageOS without Google services for better performance; however, adding Google apps may cause sluggishness.

Owners report that the S5 can perform well with custom ROMs like CyanogenMod, improving performance and storage management compared to Samsung's TouchWiz.

Owners report that some variants of the Galaxy S5 support VoLTE, but this is carrier-dependent and may require hacking to enable it.

Replacement batteries for the Galaxy S5 are often repurposed and mislabeled as new; genuine batteries from iFixIt are recommended for reliability.

Despite age, the S5 can serve as a reliable device for light browsing and video streaming with Marshmallow, though not with newer Android versions.

The S5 has been successfully used as a media player with a 512GB micro SD card and BlackPlayer EX music app for extensive music collections.

The phone is suitable as a dedicated music player, GPS device, or security cam viewer due to its replaceable battery and micro SD support.

The S5's IR blaster is a notable feature, as newer models like the S7 lack this functionality, making it still desirable for certain users.

Replacing the charger flap is inexpensive, costing just a few dollars on platforms like Amazon.

Some users reported that the S5 screen flickers at the lowest brightness and after charging, indicating potential wear in display components over time.

The S5's ease of part replacement and customization stands out compared to more modern smartphones, which often have non-removable batteries and fewer ports.

The phone's casing and screen durability are praised, especially when paired with robust cases like the Otterbox, protecting against drops and impacts.

The S5’s removable battery and expandable memory offer versatility that newer models often lack.

The Samsung Galaxy S5's compact size and micro SD slot make it ideal as a music player, despite limited internal storage and Samsung bloatware.

The Galaxy S5 includes an IR blaster, allowing it to function as a TV remote, a feature absent in many newer models.

Some users opt for aftermarket 7800mAh batteries, though real capacities are closer to 5000-5500mAh, sourced from sites like AliExpress.

Custom ROMs like those from XDA can upgrade the S5 Neo to Android 12, offering improved stability and performance over Android 11.

A package disabler app or Android ADB commands can remove bloatware to improve performance and battery life.