Root & update ur android

Kutokna na simu nyingi kukosa OTA UPDATE u can update ur android by flashing custom roms to ur phone. Most of famous custom rom include
1.cyanogen mod
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Ambyo n maarufu na ss hv wanatoa update kulingana na simu
2.Carbonrom
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CarbonRom is an aftermarket firmware based on
the Android Open Source Project .
We are dedicated to fast, stable, and feature-filled
roms, honesty and communication with our users,
and openness with our code. We like frequent builds,
with the very latest and greatest hardware support and
fixes. We strive to not only provide you with the best
rom we can build, but also to give back to the Android
community and our fellow developers. For us, this is
about creating something we can be proud of and hope
you will enjoy.
Please feel free to look at, build, and use our code
onCarbonDev GitHub
3.AOKP rom
AOKP stands for Android Open Kang Project. It is a
custom ROM distribution for several high-end Android
devices. The name is a play on the word kang and AOSP
(Android Open Source Project). The name was sort of a
joke, but it just stuck, just like our infatuation with
unicorns.
We fork the source code of Android that Google puts out
in the open with every major version release, and we
then add the magical unicorn bytes (read: we add some
of the coolest features that are both useful and make
your ROM awesome).
With AOKP, you can generally do a lot more with your
device than what you could do with the original firmware
that came installed on it.
AOKP

5.Slimrom

And more n kuchagua kutokana na uzuri na performance yake