If you are using the smartphone then there is good news for you and that is you can update your firmware all kind of firmware only in a single website platform and the best part is this is totally free and I have visited this website much time and it updating its self-day by day but you can find the related post according to your model.
Techseaker that is the name of this website and you can visit this at any time you want.
Not only there is a mobile firmware update but there is also more categories there from that you can choose what you want to check.You can Check there the latest mobile application, latest technology but also latest hacking tricks there also.
I must tell you, you should visit this site for a once in a day. And i mean it.