Xiaomi Redmi 15C vs Tecno Spark 40

Xiaomi’s Redmi C-series and Tecno’s Spark line keep fighting for the same everyday budget buyer, and the Redmi 15C lands against the Tecno Spark 40 as two 4G phones built around big screens, Helio G81-class chips, and dual Nano-SIM trays.

Both carry IP64 splash resistance, a side-mounted fingerprint sensor, a 3.5mm jack, and Android 15 skins, so the choice is less about a totally different design and more about which trade-offs you actually want to pay for.

While the two sit in the same value lane, the Redmi 15C leans into a larger 6.9-inch panel, a 6,000mAh battery, Gorilla Glass 3 protection, a 13MP selfie camera, and optional NFC depending on the market. The Spark 40 answers with a more compact 6.67-inch sheet, faster 45W charging, higher RAM cuts up to 8GB, 1440p video recording, and a lower sticker in the draft sheet. Let’s look at how both compare.

Specs score card

Xiaomi Redmi 15C	Tecno Spark 40
68/100	72/100 Better specs ✅
N200,700 ($150)	N198,200 ($148)
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Starting with the displays, the Xiaomi Redmi 15C uses a 6.9-inch IPS LCD at 720 x 1640 pixels and about 260ppi with a 120Hz refresh rate, filling roughly 80.7% of the front. The Spark 40 runs a slightly smaller 6.67-inch IPS LCD at 720 x 1600 pixels and about 263ppi, also at 120Hz, with a tighter ~84.2% screen-to-body ratio. Neither side leaves HD+ territory, so scrolling feel stays matched; pick the Redmi if you want the bigger canvas, or the Spark if you prefer a denser, more pocketable frame.

Under the hood, the Redmi 15C runs MediaTek’s Helio G81 Ultra (12 nm) with an octa-core setup (2×2.0 GHz Cortex-A75 and 6×1.8 GHz Cortex-A55) and a Mali-G52 MC2 GPU. The Spark 40 uses the standard Helio G81 on the same process with the same CPU layout and the same Mali-G52 MC2 GPU on the sheet.

Day-to-day apps and light gaming should feel close, with the Ultra naming giving the Redmi a small paper edge rather than a different performance class. Software sits on Android 15 for both, HyperOS 2 on the Redmi and HIOS 15 on the Spark.

RAM and storage split the shoppers more clearly. The Redmi 15C locks to 4GB RAM with 128GB or 256GB storage and a dedicated microSDXC slot. The Spark 40 spreads across 4GB, 6GB, or 8GB RAM with the same 128GB or 256GB storage options and microSD expansion. If you want more than 4GB of memory for multitasking, the Spark is the only one that offers it here.

Battery life is a real trade. The Redmi 15C packs a 6,000mAh cell with 33W wired charging and PD support. The Spark 40 carries a smaller 5,200mAh pack but charges faster at 45W, with the draft noting about 55 minutes to a full top-up. Pick the Redmi if all-day stamina and the bigger tank matter more; pick the Spark if short top-ups and 45W speed matter more than the extra capacity.

The camera story is close on stills and split on extras. The Redmi 15C uses a dual setup with a 50MP f/1.8 wide (PDAF) plus a QVGA helper, shoots 1080p at 30fps, and puts a stronger 13MP f/2.0 camera up front. The Spark 40 pairs a 50MP wide with PDAF, an auxiliary lens, and a dual-LED flash, can record 1440p and 1080p at 30fps, and uses an 8MP front camera with its own dual-LED flash. Main-camera megapixels match; the Redmi wins the selfie cut, while the Spark holds the higher video ceiling.

Build-wise, both list IP64 dust and splash resistance. The Redmi 15C adds Corning Gorilla Glass 3 on the front, glass or eco-leather back options, and colors in Moonlight Blue, Mint Green, Midnight Gray, and Twilight Orange, at about 173 x 81 x 8.2 mm and 205 g. The Spark 40 adds drop resistance up to 1.5m, sits thinner at 165.6 x 77 x 7.7 mm, and comes in Ink Black, Titanium Grey, Veil White, and Mirage Blue. NFC is market-dependent on the Redmi and absent on the Spark.

In essence, the Xiaomi Redmi 15C is the better pick when you want the larger 6.9-inch screen, the 6,000mAh battery, Gorilla Glass 3, and the 13MP selfie camera. The Tecno Spark 40 still makes sense if faster 45W charging, 6GB or 8GB RAM options, 1440p video, and the lower price matter more than the bigger cell and taller panel. On the sheet, the Redmi 15C sits around 200,700 Naira (150 USD) against about 198,200 Naira (148 USD) for the Spark 40, so the jump has to be worth that gap for your use case.

To help you decide which one suits your needs better, check out their complete head-to-head technical breakdown in the full comparison table below.

Full specs head to head