How can I speed up my Android phone?

Hi,
I would recommend you root your phone, that way you'll be able to overclock your phone. That's kind of complicated though. You might want to check how many apps are running & reduce the non-essential ones.
Good luck, try the 2nd method first.

check all the application running on your applications on your mobile and apart from system applications, find out the apps which are not in use or you don't use and remove them........

To speed up of your phone root your phone and uninstall the apps which are not in use.

Hi @Micky, there's a few things you can do. First of all is backup your data and do a factory reset. This will clear up a lot of junk on your phone that might be bogging it down (especially if you haven't done it before). Tony shared some good tips too in this recent article, and @YourFriend is right, you can also root your device and overclock your processor if that is a level of tinkering you are comfortable with.

Root access will also let you trim all the fat from your phone in terms of bloatware apps that may be hogging processor power running processes in the background etc. You can also keep an eye on what is using your processor and if any of those apps are needlessly hogging RAM etc you can disable or delete them. But try a factory reset (but remember to back up everything first!) and delete any apps you don't need, then you can see if you want to go a step further.

Hey I suggest you to root your phone. And delete cache memory and temp files. I this it is helpful.

what phone do u use?

i can not agree more