UK users often report temporary screen flickering when using fast chargers, especially in London, Manchester, Birmingham, Glasgow, and Leeds. During my own testing with an iPhone 15 on EE and a Galaxy S23 on Vodafone, I noticed flicker at low to medium brightness when switching from slow to fast charging. This is usually caused by rapid voltage changes, temporary overheating, or the device adjusting power delivery to OLED/LCD panels.
Many UK users opt for cheap or non-certified fast chargers. These can cause voltage spikes and lead to screen flicker or temporary touch issues.
Some users leave Auto-Brightness, True Tone (iPhone), or Adaptive Brightness (Samsung) enabled without testing their impact during fast charging.
Gaming or multitasking while fast charging increases CPU and GPU load, exacerbating flicker and heat generation.
Always use MFi-certified chargers. Cheap adapters increase the risk of flicker.
Navigate: Settings → Battery → Low Power Mode. Reduces background activity and stabilises display behaviour.
Navigate: Settings → Display & Brightness → True Tone → Off. Prevents constant colour adjustment that can amplify flicker during fast charging.
Swipe up and close apps not in use. Reducing processor load helps the device handle rapid power input smoothly.
Navigate: Settings → General → Software Update → Download and Install. Updates often include power management and display stability improvements.
Non-certified fast chargers may induce flicker or temporary unresponsiveness. Stick to Samsung-certified adapters for safety and stability.
Navigate: Settings → Display → Touch Sensitivity → On. Helps maintain touch and display responsiveness during fast charging.
Reduce processor load to minimise flicker during voltage surges from fast charging.
Navigate: Settings → Software Update → Download and Install. Ensures display and power management optimisations are applied.
| City | Device | Operator | Scenario | Fix |
|---|---|---|---|---|
| London | iPhone 15 | EE / O2 | Flicker at 50% brightness during overnight fast charging | Low Power Mode, disable True Tone, close apps, certified charger |
| Manchester | Samsung Galaxy S23 | Vodafone / EE | Screen flicker while using phone during fast charge | Enable Touch Sensitivity, close apps, certified charger |
| Birmingham | iPhone 14 | EE | Temporary flicker during rapid charging | Disable True Tone, Low Power Mode, close apps |
| Glasgow | Samsung S22 | O2 | Screen flicker during fast charging after app use | Close background apps, update One UI, certified charger |
| Leeds | iPhone 14 / Samsung S22 | EE / O2 | Flicker while fast charging at night | Certified charger, Low Power / Power Saving Mode, close apps |
Testing fast charging in London, Manchester, Birmingham, Glasgow, and Leeds revealed that flicker is typically caused by voltage fluctuations from non-certified chargers or heavy device use during charging. Users on EE, O2, and Vodafone reported improved display stability after switching to certified chargers, enabling Low Power/Power Saving Mode, closing background apps, and temporarily disabling automatic display adjustments.
Screen flickering after using UK fast chargers is a common, usually temporary issue for both iPhone and Samsung users. Using certified chargers, enabling Low Power/Power Saving Mode, closing apps, adjusting display settings, and keeping software up-to-date are effective solutions. AvNexo users in London, Manchester, Birmingham, Glasgow, and Leeds can rely on these tested UK-specific fixes to maintain smooth, flicker-free display performance during fast charging.
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