[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] zeratulbla:
Hello good day, I am from Peru (I will use the Google translator in all this answer) by chance I came across this topic and I decided to create this account just to contribute my experience with Xperia Mini Pro SK17 (I have both the SK17i and the SK17a) in the middle of 2021 Currently I have a Z3 Tablet that I use as a personal phone among other things, but I really love my Xperia Mini Pro as it was one of my first and last "Normal" cell phones before switching to my Z3 Tablet.

My SK17i I have CyanogenMod 4.3.1 Released with Bootloader + Recovery etc everything that can be unlocked by logic when having it unlocked I do not think it is necessary to mention the minimum applications for the proper functioning of it, you can put customs with higher numbers so So you will have no limits in installing apps with the proper data partition to the SD card.

My SK17a I have the stock Rom of 4.0.4 the famous 4.1B.0.431 of course this stock rom is already old and out of date but my advantage is that I have it Rooted + Recovery (But with blocked bootloader which is not an impediment to me I don't plan on updating this cell phone to a higher version) so, I really love this stock Rom I love the music player, the Xperia launcher and the RADIO! Oh my god the radio is something that I can't use in cyanogen but in my stock rom and some functionalities such as image and audio enhancement that you can only use with the stock rom, I love how it looks great but as well we all know , we have 2 types of limitations.

1.- It is old, we cannot install modern applications or have gaps.

2.- If we try to install things from the play store then the phone will saturate us, taking away those 420mb of which we can only use 200 to 150 free megabytes.

So how can I use my cell phone in 2021? With the basics (at least for me) Facebook, VK, Youtube and messaging without having to install high-weight apps and without resorting to Gaps? Well then I will proceed to explain my odyssey and a solution for those who have this wonderful rom of stock.

First: We have to eliminate all the apps that we know are useless or potentially consuming the sacred space of our phone, for this we have to have ROOT on our cell phone and install Link2SD 3.1.5 This version weighs approximately 1.87MB so it will not take up much space , this application will allow you to freeze and uninstall system applications, in my case it purges the Play Store and its derivatives such as Google play services, Music Unlimited, Mail Exchanger, Gmail, Email, Market Update, News and weather, Playnow, Trackid , YouTube and derivatives to that application, Music extensions and things that I know that will not affect the start of the system, having done this we have freed up a lot of space in addition to leaving the system a little more "accelerated" since we have purged applications that today They do not work (no matter how much you try to start them, it will ask you for gaps or it will give you a 404 error or it will not load because they simply expired)

Second: Since we have freed up space now I will leave the applications that I use and install to replace most: Facebook:

- Facebook Lite version 23.0.0.6.149 Total weight 4.50MB + or -<- You can clone the application if you have more than 1 Facebook account, you can watch videos and do everything you would with normal Facebook.

- VK: VK version 4.6.0 Total weight: 67MB + or -<- It is another social network as well as Facebook, the bad thing about this version that you can not listen to music but you can see videos that you have stored etc.

- Gmail, Outlook (And I think more messengers but I only use those: K-9 Mail version 5,600 Total weight 10MB approx, keep in mind that to use Gmail in this version you must authorize less secure applications in your Gmail account, to date not I have had no problem using this.

- Youtube: Using Lighting Browser Version 4.5.1 Total weight: 4.44MB + or -<- enter youtube using m.youtube.com and you can see any video fluently.

- Whatsapp :( : I would have liked to place here an alternative to whatsap but unfortunately no application I found even looking and looking for the closest thing to this that I found was the "Whatsweb version 3.2.8" but unfortunately it will not work an error will appear asking you to update the browser and the versions Whatsweb superiors are not compatible with Android 4.0.4, for me it is not a great loss since I have fully functional whatsap in my Z3 tablet also most of the businesses I do are through Facebook market which I access through Facebook lite already mentioned.

Next, I will place the personal applications that each application uses as those already mentioned above are applications that I have taken the time to download, install one by one and test taking into account the limited space we have available to install applications on the cell phone due to the reduced 200 or 150 mega size available we have.

- CPU Z 1.19 total weight 3.21MB + or -. <- We all know what it is for, to delight ourselves with the specifications of our cell phone.

- 17Track 2.2.1 total weight 14.15MB + or -<- If you have tracking codes like me you can use them here.(Unfortinelly dont work actually :( )

- MiXplorer 6.54.6 Total weight 10.58MB + or - <- Note that this at least for me is an improvement, it is file explorer, it is light, I can activate sharing via FTP, it has a basic built-in music and video player, I can enter my computer via LAN and play video and music without major complications and it is very light for me, the best browser and has many more things but I do not want to extend myself.

- Power Toogles 5.0.10 Total weight 0.89MB + or - <- The best Widget to manage the wifi airplane mode flashlight etc that you can have.

- Notes 1.5.6 Total weight 6.52 + or - <- Useful to create a widget with notes that you need at hand.

- Titanium Backup 8.0.1 Total weight 10.52MB <- If you want to backup the applications before uninstalling it then, you can use this is useful and light.

- VLC 2.0.6 Total weight approx 39.06MB <- you can play anything I use it to watch videos + MiXplorer on my pc, it is light and captures anything.

- Voice Recorder version 12 Total weight 2.12MB approx <- Useful to record voice

Emulators:

- ePSXe 2.0.7 Total weight 10.11MB Approx. PSOne Games

- Gensoid 2.4.3 Total weight 1.00MB Approx. Sega Genesis games.

- My OldBoy Paid version 1.3.4 Total weight 896KB Approx. GBC games

- My Boy 1.7.0.2 Paid Version total weight 2.73MB Approx. GBA games

- NEO.emu 1.5.9 Total weight 2.10MB approx. Arcades Metal slug games 1 2 3 4 5 kof etc.

- Nesoid 2.5 Total weight 2.5MB Approx. Nintendo games.

- SNesoid 2.2.4 Total weight 2.44MB Approx. Super Nintendo games.

Light games:

- Glow Hockey 1.2.19 Total weight 15.80MB.

- OpenTyrian 2.1.25 total weight 9.48MB.

Raging Thunder 2 1.0.16 Total weight 31.06MB <- this will install part of your system on your external SD card.

And with all that I still have 74 MB Free Hahahaha, please keep in mind that the apps that I mention are apps that I downloaded, installed and tested myself for months and it has not given me any problem, if you know apps that consume less memory and are efficient I invite you to publish and use them, I am aware that many of the apps that I mention have updates nowadays but they weigh more and are not compatible for Android 4.0.4.

If you choose to use these apps then at the end of the process of purging and installing everything, if you uninstall Link2SD and TitaniumBackup you should have 88 - 92MB Free, I hope this answer is useful for those who want to use their SK17 with stock Rom today in In the middle of 2021, forget to mention that I can surf quietly, listen to music and watch my networks quietly on the street using the 3G cellular data signal, I also recommend that you purge cache of the applications every so often if in case you feel that you can free up more space, well I do not extend more I hope it is useful luck !.