[Xperia Z3 General] GhostRaiderMX:
For those who recently bought a Sony Xperia Z3 (D6616) from T-Mobile, there is bloatware which currently can't be removed. Some of these apps run in the background which can cause a decrease in battery life and eat up available RAM.

But if RAM usage isn't important, why bother clearing up RAM? Because with that available RAM, you'll be able to put it to good use rather than giving that RAM to worthless applications. Maybe that extra RAM can go to a launcher :)

After a reboot, my device is using a minimum of 1.1 - 1.2 GB which is almost the maximum I could lower it as far as I know on the T-Mobile Xperia Z3. Other versions of the Xperia Z3 might have an advantage because they are bloat free and rootable. Some services cannot be disabled.

My Running Apps after a reboot (freshly opened device):

Facebook (58MB)

PlayStation App (5.2MB)

com.sonymobile.touchscreen.touchfilter.tfpss (4.6MB)

Device Usage (15MB)

USB Connectivity (5.1MB)

Enterprise Service (10.0MB)

com.qualcomm.qcrilmsgtunnel (4.4MB)

SmartcardService (4.9MB)

Messaging (7.2MB)

Media (28MB)

Google Play services (47MB)

Photo Analyzer Service (5.4MB)

User Data Logging (8.2MB)

YouTube (25MB)

Xperia keyboard (9.5MB)

RAM USED: 1.1GB ; RAM FREE 1.6 GB ; MAX RAM 2.7 GB

1. Facebook

Description: This has to be running in order to receive push notifications while the Facebook app is closed.

2. PlayStation App

Description: This has to be running in order to receive push notifications from PlayStation Network while the PlayStation app is closed. Can be disabled if you don't use any PlayStation device.

3. com.sonymobile.touchscreen.touchfilter.tfpss

Description: Simply put, it involves the touch screen.

4. Device Usage

Description: Keeps track of the phone usage.

5. USB Connectivity

Description: When a USB cable is connected, it triggers the action selected in Xperia Connectivity settings.

6. Enterprise Service

Description: If we're not involved in an enterprise, why have this running? I don't know but it cannot be disabled.

7. com.qualcomm.qcrilmsgtunnel

Description: It involves the phone dialer.

8. SmartcardService

Description: I believe this to use smart cards with the NFC chip. It's running even though it is not being used. Cannot be disabled.

9. Messaging

Description: If you like receiving SMS messages with the stock messages app, it should be running.

10. Media

Description: Involves device storage. Should be running.

11. Google Play services

Description: There can be multiple services of this running. Involves Google Play so it should be running.

12. Photo Analyzer Service

Description: I believe this is the face analyzer for the Album app. It analyzes faces in photos in the background. Could be disabled if needed.

13. User Data Logging

Description: Yes, the government is spying on you. That or it's part of Device Usage.

14. YouTube

Description: For some reason, this app likes to run in the background. If you close it, it comes back to haunt you. Why do we need OfflineTransferService?

15. Xperia keyboard

Description: The Xperia keyboard you see on your Xperia device. This process is replaced if you use a third party keyboard such as Google Keyboard.

These are the Apps I disabled:

App Source

Clocks

Google Search

Lookout

T-Mobile My Account

T-Mobile Name ID

Photo Analyzer Service

1. App Source

Reason: I have no Idea what's the point of this app. Disabled.

2. Clocks

Reason: The lock screen has a nice clock. I enabled the clock on the status bar. There's no point in having this process running unless you are using the clock widget on your home screen. I mean wouldn't you like to see the time when watching a YouTube video instead of closing the app just to see the time and opening up YouTube again?

3. Google Search

Reason: I don't know about you guys but I don't really need this. I mean fire up Chrome and use Google there. Once disabled you can hold on the search bar and hide it. Of course if you want it back you have to clear the Xperia Home cache on the Apps settings.

4. Lookout (Built-in Antivirus)

Reason: It's fine if you want to leave it enabled. It doesn't really use much RAM but it does tend to take a penalty on the CPU usage, which of course affects battery life. If you never download files outside the Play store, it might not be worth having it running. However disabling it also disables device tracking if for some reason you lost your phone.

5. T-Mobile My Account

Reason: I don't see any use for this. You can always use Chrome and check your account from there too. While the app is convenient, for some reason it has to run in the background when not in use.

6. T-Mobile Name ID

Reason: This isn't free, disabled.

7. Photo Analyzer Service

Reason: Although the Album app is a great app to see your photos and videos, I'm using Google Photos as my primary photo and video manager because of its free sync storage to the cloud. This service is useless if you use another photo and video manager.

Note that this is a freshly opened device with no installed applications. Some apps like Facebook Messenger will continue to run in the background due to their push notification services. Your mileage may vary.

With that 1.5-1.6GB of free RAM you can use it for anything else! :good:

One thing to keep in mind is that T-Mobile Visual Voice Mail has a tendency to run every few minutes, which accesses the data network. This little app uses your battery constantly without you knowing. It disappears and reappears on the Running Apps list.