Welcome to the forum!
The Nokia 501 doesn't have an option to set a theme. However, you can set a wallpaper for the lock screen and the home screen. To do this just go to the Settings, look for Personalisation and then change the wallpaper set under the Home Screen or Lock screen.
Hope this helps. Let us know if you have another concern.
thx for your reply.
I cannot set my personalised pic as background screen.
however, I can set my personal pic as screenlock.
even after the software update, we cannot expect any themes....?
I am a Nokia customer, I have been use Nokia for long time ago and then I used other brand but now I decided to use Nokia because I think now it will be better. However this afternoon I bought a new Nokia Asha 501 and expected that it would be nice but what a **bleep**! how a phone can't change the home screen? I am wrong to choose this brand. Nokia deserve this low market.........
keang, rather than going for the Asha Software Platform. you could have gone for a Nokia 700 (Symbian), a Nokia 311 (Series 40), or a Nokia Lumia 520 (Windows Phone). By the way, what exactly did you like to change? The wallpaper?