Compare Mobile Phones Side-by-Side

The Realme C100i has the simpler sales pitch: it gives you the bigger battery and a marginally larger screen while keeping the same 120Hz refresh rate and 4GB RAM. If maximum time away from the charger is your priority, that 7000mAh cell is the most meaningful advantage in this comparison.

The Oppo A6x 4G feels like the safer pick if you care more about the underlying platform. Its Qualcomm processor is the one detail here that may matter more over time than the tiny display-size gap, especially for everyday responsiveness, app compatibility, and general reliability. The 6500mAh battery is still very large, so you are not exactly sacrificing endurance.

Between these two, I would lean toward the Oppo A6x 4G for a more confidence-inspiring daily phone, unless battery capacity is your main buying reason. In that case, the Realme C100i makes perfect sense.