Realme C100 5G Review: Rugged, Battery-First Entry Phone

Back on the French market after an absence that did not exactly shake the sector, Realme intends to establish itself with a broad catalogue of entry-level models. The C100 5G fits that logic: a handset designed to last a long time and survive everyday life rather than to impress with raw power or photography.

After the more ambitious GT 8 Pro and 16 Pro+, the Chinese manufacturer returns to basics with a 6.8-inch LCD screen, a MediaTek Dimensity 6300 chip and a 6600 mAh battery. The configuration reviewed here pairs 4 GB of RAM with 256 GB of storage; a less prominently promoted 128 GB version also exists.

Its angle of attack is straightforward, offering a solid, long-lasting 5G handset without aiming for the moon, which at least saves it the trouble of having to reach it. It still has to defend itself against the Samsung Galaxy A17 5G and the Redmi Note 15 5G.

The Realme C100 5G is nothing like a small handset. At 166.38 x 78.13 x 8.45 mm and 224 g it is fairly massive and quickly makes itself felt in a pocket. That bulk is explained in part by the 6600 mAh battery and by reinforced construction. Helpfully, the phone is not slippery, which limits involuntary juggling.

The overall look is very conventional. A flat back, straight frame and separate camera modules integrated directly into the shell recall certain Samsung Galaxy S handsets, although the resemblance stops there, all the more so because that triple camera array is not really one, as explained below. Plastic dominates the construction, even if the finish is carefully done. The result is not bad, but it is modest and frankly rather cheap-looking.

Realme offers the C100 in two colours, Sprouting Green and Blooming Purple. Their matt surface holds few fingerprints, which stops the phone looking like a crime scene after three messages. The pearlescent effect can look a little flashy, however, as can the glossy coating around the camera area.

At the front, the 6.8-inch LCD occupies 87.32% of the face. That is respectable given the thick bezels and the prominent chin. The panel is protected by Panda Glass, which is described as more resistant to scratches and small impacts, though that is impossible to verify without organising a torture session.

Robustness is one of this model's major arguments. The brand claims MIL-STD-810H, citing 14,000 micro-drops and various torsion tests internally, and adds IP64, useful against dust and splashes. That does not make the phone waterproof, but ordinary mishaps should be less likely to turn into a drama.

The fingerprint reader sits in the power button, and face recognition through the front camera completes the security options; the camera itself occupies a distinctly old-fashioned teardrop notch. The handset takes two nano-SIMs but has no eSIM, although the dedicated slot will accept a microSD card to expand storage. It supports Wi-Fi 5 and Bluetooth 5.3, both dated standards, and retains a headphone socket, which is increasingly rare. There is no NFC and no wireless charging.

The C100 5G has a 144 Hz, 6.8-inch display showing 1570 x 720 pixels, a density of 254 ppi. The quoted maximum brightness of 900 cd/m2 and the choice of an IPS LCD panel make its entry-level positioning clear, but the promise is kept: the recorded measurements show a peak of close to 894 cd/m2.

Although its contrast ratio of 1794:1 is respectable, the display is less heroic outdoors. With reflectance above 48%, higher than the average of the comparison set, reflections intrude quickly and legibility in bright sunshine becomes laborious.

For anyone who reads in the dark, the minimum brightness of 1.7 cd/m2 is easy on the eyes, while persistence of 16 ms remains acceptable. On calibration, however, the default mode lives up to its name: delta E of 8.23 and a colour temperature of 6996 K, so a cool and heavily saturated rendering.

Switching to the Natural-warm mode improves matters, with a delta E of 4.13 and 6617 K, closer to the video reference, but colour drift remains clearly visible. This is a fluid and usable screen rather than a model of accuracy.

The C100 5G does not try to impress with its specification sheet. Driven by a MediaTek Dimensity 6300 built on a 6 nm process and paired with 4 GB of RAM, it targets the most common uses, and on that basis the contract is broadly fulfilled. Web browsing, calls, social media, satellite navigation and streaming platforms all run without particular difficulty.

The relative modesty of the configuration nonetheless shows through in stuttering animations and loading times longer than those of its direct rivals. Nothing is unacceptable day to day, provided a degree of patience is available.

The handset's limits become more apparent when several apps have to be handled at once. Realme does offer 8 GB of virtual RAM taken from internal storage, but its effectiveness remains limited compared with a genuine increase in memory. The interface then shows signs of strain, and the most demanding services can make the processor falter.

Despite several preinstalled titles, the C100 5G was clearly not designed to appeal to gamers. Its average frame rate of a little over 60 frames per second is nonetheless reassuring. Light games pose no problem at all, but heavyweights such as Genshin Impact risk turning into an exercise in perseverance rather than a moment of relaxation.

As noted above, the C100 5G gives the impression of carrying three camera modules aligned vertically without a protruding camera block. The reality is rather different, because the arrangement is essentially cosmetic. Only one sensor, of 50 megapixels behind a wide-angle lens opening at f/1.8, is genuinely functional. The second module appears to house a depth sensor, while the third is purely for show and completely empty.

The C100 5G is no photographic champion, but it acquits itself reasonably well in daylight. Colours remain broadly faithful and detail is decently rendered at the centre of the frame. There is slight overexposure and there are some artefacts, however, and quality falls away noticeably towards the edges.

The phone is not at all suited to night owls. Images take on an orange cast, software smoothing struggles to mask digital noise and the rendering loses naturalness. Contrast handling still keeps a scene readable, but the centre already lacks precision and the periphery becomes distinctly blurred.

At the front, the 5-megapixel selfie camera at f/2.2 works no miracles and self-portraits logically lack bite. The results are still acceptable given the hardware on offer, provided the light is there.

Video is limited to Full HD at 30 frames per second on both the main and front cameras. That is a basic showing, sufficient for social media posts but ultimately quite modest.

With its 6600 mAh battery, which Realme calls Titan, the C100 5G has high ambitions for endurance. The results are indeed solid without breaking records: under a mixed-use protocol the phone lasted 20 h 15 min before giving up.

That performance makes more than a day of use possible without reaching for a charger. It remains some way behind the references capable of passing 24 hours under the same conditions.

The generous battery supports 45 W charging, enough to return to a full charge in 1 h 29 min. That is not especially fast, but it is consistent with the capacity involved. Realme also highlights longevity, stating that at least 80% of capacity is retained after 1600 charge cycles.

Finally, the C100 5G offers reverse wired charging limited to 6.5 W, useful for occasionally topping up earphones, a fitness band or even another phone when the situation demands it.

The C100 5G is more comfortable in mobile gaming and more robust than the Samsung Galaxy A17 5G, but it cannot match its South Korean rival on software durability or display quality. Against Xiaomi's Redmi Note 15 5G it is again the more enduring handset, but it loses ground on photography and raw power.