: Many ROMs included scripts to boost the processor clock speed (e.g., from 434 MHz to 536 MHz on the 5800) to reduce lag, especially when using complex themes.
| | Key Features / Reputation | Notable Devices | | :--- | :--- | :--- | | Skyfire Belle 2.1 | Ultra-fast, beautiful Belle-like UI, HTML5 browser, pre-cracked, highly stable, large free memory | Nokia 5230, 5800 XM, N97, X6 | | Delight CFW | Highly modular and customizable, exclusive mods and widgets, user-changeable language packs, regular updates | Nokia N8, E7, 500, 808 PureView | | Symbian Anna v7.9 | Ported many features from the N97 Mini, known for being a stable and feature-packed port of the Anna UI | Nokia X6, 5800 XM, 5530 XM | | C6 v41.x CFW | Replicated the homescreen, widgets, and applications of the Nokia C6, a popular QWERTY slider phone | Nokia 5230, 5800 XM | | LinsPirat LTS Rev2.1 | Hailed by some as the "best firmware" for its stability and comprehensive set of features | Nokia 5233, 5230, 5800 XM, 5530 XM, X6 | | Cyanogen Mod (Concept) | A popular conceptual discussion about porting the Android-based CyanogenMod to Symbian, highlighting the ambition of the community, though it never came to fruition | | symbian s60v5 rom exclusive
Click the FLASH button. Tap the phone's power button briefly when prompted by the software to initiate the flashing sequence. : Many ROMs included scripts to boost the
Exclusive ROMs baked in advanced predictive text engines and horizontal QWERTY layouts that weren't natively available on older firmware versions. Legendary S60v5 Custom ROMs You Should Know Exclusive ROMs baked in advanced predictive text engines