There is a locked program on the phone, and the memory cannot be released

Open the security software and there it is.

Tap and hold the icon and drag it up.

In the settings, there is a software that cleans up and ignores on the system cleanup, and you cancel it.

The reason for this is that the phone memory is full, install too much software, and the software generates too much cache and garbage, so you need to clean up the cache regularly and clear the software that is not commonly used.

In addition, there are too many mobile phone numbers and too many text messages stored in the mobile phone.

You can check whether your phone's actual remaining storage space is sufficient in your phone's Settings - General - Storage?

You can double clear your phone and free up more storage space Steps of Double Clearing: After turning off the phone, press and hold the volume down key and the power on button at the same time until you enter the recovery engineering mode, and then select Clear Data and Cache. Tips:

Please back up the important information in your phone before clearing to avoid loss.

Based on the description, it is recommended that you:

1.Uninstall a recent attempt to install third-party software.

2.Check whether the phone has a system update push and upgrade the phone to the latest system version.

3.Back up your data (contacts, text messages, **, etc.) and try to do a factory reset.

If the problem persists, it is recommended that you bring the machine, purchase invoice, and repair card to the local Samsung after-sales service center for testing.

The phone's running memory cannot be released, so you can clean it up with the help of the sync assistant.

Here's how:

1) Install Sync Assistant on your computer;

2) Open the sync assistant and connect the 4S phone;

The running memory display is not as large as the specification,Because the system shields a part of the graphics card as video memory,For the smoothness of the game,Generally divided into 48-50 more,Try to buy a 1G mobile phone that runs memory,Or install extended memory or virtual memory software,Use the memory card as running memory,Prohibit boot startup items,Try to open service items as little as possible,Install a smaller mobile phone guard,Android system set the number of background processes 4,512 memory does not run the game standby basic running memory occupies 41%.

After root, some background self-starting software is prohibited,You can also uninstall those pre-installed software,It will improve a lot,You can also install a one-click cleaning software。