My Samsung 3502U phone always auto shuts down what s going on?

1. It may be a problem with the electric board, you open the back cover to see if the electric board is bulging or damp (some electric boards have a waterproof sign and the moisture sign will turn red).

2. The mobile phone is damp (whether the waterproof sign turns red).

3. System problems (try to restore factory settings).

4. The problem cannot be solved, and the after-sales service (one-year warranty for mobile phones) is decisively found

Based on your description, it is recommended that you do the following:

1.If possible, replace the spare battery. Test whether it is an automatic shutdown caused by poor battery performance.

2.Remove the battery and clean the metal contacts of the battery and the battery of the mobile phone with an eraser. Eliminate automatic shutdown caused by poor contact caused by oxide layer in the metal contacts of the battery.

3.Back up your phone's data (**thin, SMS, multi**data, etc.), try to restore your phone to factory settings, and preliminarily rule out system problems caused by installing third-party plug-ins.

If the problem persists, it is recommended that you bring the three-pack voucher and send the mobile phone to the nearest Samsung service center for testing, and please visit the specific service center address.

If your phone automatically shuts down, please follow the steps below to troubleshoot and deal with it

Step 1: For mobile phones with removable batteries, you can turn off the battery and use a cotton swab to clean the metal contacts of the battery.

Step 2: Back up your phone's important information and reset your phone; Settings - General Management - Reset - Factory Reset.

In standard mode, tap Settings.

2.Swipe up on the screen and tap General Management.

3.Swipe up on the screen and tap Reset.

4.Click Factory reset.

5.Click [Heavy Status].

6.Click Delete all.

Step 3: If none of the above methods work, please bring the three-pack voucher and mobile phone to the Samsung service center for testing.

If your phone turns off automatically, it is recommended that you:

1.To check whether the battery level of the mobile phone is low, it is recommended to connect the original data cable to charge it for a period of time.

2.If it doesn't work, check whether the phone can be used normally after it is turned on. Some mobile phones support the auto on and off function, it is recommended to try to turn it off: Settings - Backup & Reset - Auto On & Off - Auto Off - Off.

3.If it doesn't work, it is recommended to back up the data in your phone (contacts, **, messages, etc.), and factory reset your phone to see if the same problem occurs.

4.If your phone's battery is removable, try replacing it with another original battery to rule out the battery issue.

If the problem persists after the above operation or the mobile phone cannot be used normally after turning on, it is recommended that you bring the purchase invoice, warranty card and mobile phone to the local Samsung service center for professional engineers to help you test.

The reasons for the general automatic shutdown may be as follows:

1. The protection circuit in the lithium battery is overly sensitive, so the current will be cut off as soon as it is large.

2 The battery itself is aged.

3. There is dirt on the metal sheet at the contact point of the battery, which causes poor contact with the power supply.

4 The joint between the battery and the mobile phone is prone to loosening.

If, after inspection, it is found that the first two problems are the first two problems, then it must be sent to a specialized repair shop for repair. If the latter two problems are caused by the oxidation of the dirty metal sheet of the battery, the situation will be improved as long as it is wiped clean with a glue stick. Putting paper or film between the battery and the phone can also solve the problem of poor contact caused by loose batteries.

Causes and solutions for automatic shutdown:

1. Confirm whether the contact between the battery and the mobile phone battery connector is reliable and normal. If it is found to be loose, there is a hidden danger that will lead to automatic shutdown. You can improve the contact between the two by adding a "pad", which is simply to squeeze the battery tightly and don't let it shake casually.

2. There is a virtual welding phenomenon in the nickel strip inside the battery or the link between the protection plate and the battery cell, which will also lead to unstable power supply and automatic shutdown. It is recommended to replace the battery in this matter.

3. If the motherboard fails, there is usually a problem with the CPU, memory or PM (power management), resulting in unstable power supply, and it needs to be repaired.

4. Software failure, because there is a bug in the software operation, the internal mechanism automatically determines the restart, so it will be found that it will often automatically shut down and restart. You can try to upgrade the software again.

If your phone turns off automatically, please try it step by step by step:1Whether the automatic power-on and shutdown function is set; 2.

For mobile phones with removable batteries, you can turn off the battery and use a cotton swab to clean the metal contacts of the battery. 3.Back up your phone's important data and reset your phone; The above methods are invalid, please bring the three-pack voucher and mobile phone to the Samsung service center for testing.

First of all, you have to make sure that your phone has water or has fallen unplugged the memory card, try it, if it doesn't work, just change the battery, try these two reasons that will cause the phone to automatically turn on and off, if they don't exist, you can only take it to repair.

Does your phone have a lot of software installed?