There should be a calendar, right? Take another look. I9023 does have less software, which you should be happy about, otherwise some software can't be deleted until you can only brush the root of the machine. So it's better to have less software. You can download any software you want. Now let me talk about what software is necessary. You download a 9 1 mobile assistant (Douban clip is also acceptable), then install a 9 1 mobile assistant computer client on the computer (Douban pod also looks for its computer terminal), then open the computer terminal and connect the data cable, so that the mobile phone and the computer will be automatically connected. Then install the software directly in the 9 1 assistant on the computer. Personally, I don't recommend safe antivirus software. After all, there are very few cases of mobile phone poisoning. As long as you ensure that you don't install software of unknown origin, there is generally no problem. I think it is enough to install a software that can clean up garbage. I recommend that you are an "Android optimizer", which is the software of Android system, and there are many functions in it. To watch videos, you must choose moboplayer, which is recognized as the best video player on Android phones. As for the music player, the system has fewer functions. I use a daily music player, which I personally think is good. You definitely need the next picture browsing software, because the system comes with that sometimes unclear situation, and I use fast map browsing. File manager, I recommend es file browser, which is also recognized as better. You can also download a camera software with less functions. I use a 360 camera. I don't know if you read e-books, but I recommend you to use ireader, which is considered the best. By the way, I almost forgot the input method. The system really can't input Chinese. It is recommended that you use Baidu input method, which is generally suitable for installation in the selected skin touch-screen mobile phone. The SMS software has to be installed, and you can't choose your own contacts. I recommend using go SMS, which has many functions. Feel free to install the go desktop to make the settings more personalized. Mobile phone typing is almost finished. I'm so tired. You can ask again if you don't understand anything.