Top 10 phones under £300 for kids who play Roblox
If your offspring is one of the 29 million kids who play Roblox on their phone, they probably need a device that can run it without lag. So if you’re looking to buy them a new smartphone, it’s worth considering options that won’t break the bank but still offer a capable processor, a smooth display and stable performance under load.
All phones listed below come from our under £300 catalogue (as of 28 January 2026) and are strong performers for light to mid-range gaming.
1. OnePlus 10T
Price: from £272.76
Processor: Snapdragon 8+ Gen 1
Screen: 120Hz AMOLED
The Snapdragon 8+ Gen 1 handles online games effortlessly, with stable frame rates and no stutter. The 120Hz screen makes animations and camera movement smooth.
2. OnePlus 11R
Price: from £288.49
Processor: Snapdragon 8+ Gen 1
Screen: 120Hz AMOLED
Very similar performance to the OnePlus 10T, with excellent sustained gaming behaviour. Roblox runs comfortably at high settings and the large display helps with touch accuracy.
3. Xiaomi POCO F5
Price: £242.77
Processor: Snapdragon 7+ Gen 2
Screen: 120Hz AMOLED
One of the best value gaming phones available. The Snapdragon 7+ Gen 2 is more than enough for Roblox, with strong CPU performance and efficient power usage.
4. Vivo X80
Price: £267.44
Processor: MediaTek Dimensity 9000
Screen: 120Hz AMOLED
A proper flagship chipset. Roblox runs smoothly with fast load times and consistent performance. MediaTek’s Dimensity 9000 has no trouble with this class of game.
5. Samsung Galaxy S21+
Price: £271.34
Processor: Exynos 2100
Screen: 120Hz Dynamic AMOLED
While the Exynos chip is not the strongest here, it is still perfectly capable for Roblox. The display quality is excellent, and gameplay remains stable.
6. Samsung Galaxy Z Flip 4
Price: £283.24
Processor: Snapdragon 8+ Gen 1
Screen: 120Hz AMOLED
Performance is far stronger than most people expect from a foldable. Roblox runs smoothly, and the Snapdragon 8+ Gen 1 does the heavy lifting without issue.
7. Apple iPhone 12
Price: £263.79
Processor: A14 Bionic
Screen: OLED display
Despite its age, the A14 Bionic is still very capable. Roblox on iOS is well optimised, and performance remains smooth with minimal frame drops.
8. Google Pixel 7
Price: £282.76
Processor: Tensor G2
Screen: 90Hz OLED
Not a gaming-first phone but Roblox runs reliably. Frame pacing is stable and the display quality is good enough for long sessions.
9. OnePlus 9 Pro
Price: £271.09
Processor: Snapdragon 888
Screen: 120Hz AMOLED
Still a solid gaming option. Roblox runs without issues, although thermal performance is slightly weaker than newer Snapdragon models.
10. Samsung Galaxy S20 FE
Price: £225.64
Processor: Snapdragon 865
Screen: 120Hz Super AMOLED
Older but proven. Online games perform well and the Snapdragon 865 remains reliable for stable performance even today.
For Roblox, phones with Snapdragon 8-series, modern MediaTek Dimensity chips, or Apple A-series processors handle it comfortably. A high-refresh AMOLED screen improves the experience, but raw performance matters more than marketing labels.