When to replace the rear glass of your Galaxy S21 Ultra 5G

The rear glass of the Samsung Galaxy S21 Ultra 5G should be replaced as soon as it shows cracks, deep scratches or visible impacts. Unlike the front screen, this part does not affect the display, but it protects the camera sensors and internal chassis. Damaged glass allows moisture to seep in and exposes components to dust, accelerating wear on optical systems. Quick repair prevents much more costly damage to the battery or cameras.

Compatible glass, workshop-tested

This Midnight Blue rear glass is a compatible part manufactured by selected third-party makers and validated against strict technical compliance criteria. Each batch undergoes systematic quality control before being stocked, ensuring reliability comparable to the most stable parts on the market without the extra cost of original manufacturer components. It meets the same dimensional and mechanical specifications as factory glass: same impact resistance, same anti-glare treatment, same integration with the optical system. This demanding selection makes it possible to offer an economical part without compromising on repair durability.

Exact compatibility with the Galaxy S21 Ultra 5G

This glass fits the Galaxy S21 Ultra 5G (model G998B) and this device only. The Galaxy S21 Ultra differs from the S21 and S21 Plus in its dimensions, camera system and chassis thickness. Before ordering, verify that your device is indeed a Galaxy S21 Ultra 5G: the name appears in system settings under "About phone". Neighbouring models have their own part numbers in stock.

Exact shade: Midnight Blue

The colour supplied is Midnight Blue, a dark shade close to black with a slight blue reflection in light. This is not a light blue or standard blue: it is the official Galaxy S21 Ultra shade of this generation. If your original device is a different colour (Silver, Black, Grey or White), this part will not match aesthetically. Check the shade of your glass before replacement.

Installation and precautions

Replacing the rear glass requires thermal equipment to soften the old adhesive, a plastic spatula to lift the part without scratching the chassis, and a solvent-free cleaner. The absence of a Samsung logo on this compatible glass avoids counterfeiting questions and offers a clean finish to the device. Allow the new polymer seal to dry for 24 hours before use to ensure waterproofing. Minor cosmetic imperfections (micro-scratches) are normal on a compatible part and do not affect durability.

2-year warranty on this part

The glass comes with a 2-year warranty from the date of purchase. If a manufacturing defect is detected within this period, the part will be exchanged or refunded. This warranty covers material defects and poor workmanship, not wear due to installation, accidental impacts after installation, or surface scratches caused by use.