Questions :
Could you please answer following two questions about Samsung Galaxy Ace?

1. How do I root Android 2.2.1 (JXKC1) ? I've tried some ways but they didn't work; such as "z4root" or "supper one click". My friends say i should first upgrade it to Gingerbread 2.3.3 but I don't want to lose lots of installed apps and a calendar with hundreds reminder points!

2. Is there any app to lock the screen? I know this feature is on phone but it locks it in period of time like every 30s . I wanna do it myself when I need.

Replies :
It simple to root Android 2.2.1. Most probably Super One Click can root it so, I suggest you try it again following these simple instructions. However, if you are still unable to root with it try using Unlock Root app, which is a one click simple root utility that supports and roots many devices in no time. You can find more information about it and download it from here. If you are still unable to root, post a comment below and we'll work out something for it.

However, I too would recommend you to upgrade to latest Gingerbread 2.3.6 version since you'll get a lot of improvements in your device and smooth performance after the update. I can see that you are afraid of losing your apps and data. But, there's no need to worry about it. You can use a powerful mobile management tool called MyPhoneExplorer  to backup most of your data including contacts, SMSs, Calls Lists, Calender, Notes, Alarm, etc and many others.

Just connect your device to the PC and run MyPhoneExplorer app then, sync everything to your PC as well as do a backup from Extras menu. Later you can sync the data again back to your device. Most probably it can help you backup applications too, but, if you are unable then use App Control app to backup your applications. Also, calender is in constant sync with Google servers, so, you won't lose your remainders even if you don't back it up. So, grab MyPhoneExplorer from here and give it a try. You can alternatively use Smasung Kies to sync your apps, however the difference is Samsung Kies is not compatible with custom roms while MyPhoneExplorer stand out with most android devices with any rom out there.

Then, follow these simple step by step instructions to upgrade to latest Android 2.3.6 version. When you are done upgrading you can simply root your galaxy ace gt-s5830 smartphone by flashing a small zip file on your recovery. Detailed steps on rooting galaxy ace running gingerbread are given in this article.

I'm not sure about the lock screen thing. I can't understand why you'd like to keep your screen awake as it will consume some battery. So, it is better to lock your screen while not in use. However, I think I got what you are trying to do and a simple solution is change the screen lock time to 15 minutes or 30 minutes depending upon your preferences. Then, it won't turn off in 30 seconds, but if you'd like to turn it off you can press the Power (aka Lock) button and lock the screen whenever you want. This is quite secure method, since it will lock the screen anyway in 15 or 30 minutes even if you forget to lock it by yourself.

I hope this solves your problem and all your queries are answers. If you have any doubts, do post a comment below and I'll try my best to clear it out. Have a nice time rooting and upgrading.