Oppo F3

1. Open the “Settings” of your device.
2. Choose “App Management”.
3. Choose “Threema” from the list of apps.
4. Next to “Allow Auto Startup”, make sure that the switch is turned on, i.e. with its knob or handle at the right.
5. Leave by pressing (“Home”) at the bottom of your device.
6. Open “Threema” on your device.
7. Leave by pressing (“Home”) at the bottom of your device.

Have you been able to follow these steps on your Oppo F3?
👍  Yes 👎  No

1. Open the “Settings” of your device.
2. Choose “Battery”.
3. Choose “Energy saver”.
4. Find “Threema” in the list of apps.
5. Next to “Background freeze” or “Freeze when in background”, make sure that the switch is turned off, i.e. with its knob or handle at the left.
6. Next to “Automatically optimize when an anomaly is detected”, “Abnormal apps optimization” and “Doze”, make sure that the switches are turned off, i.e. with their knobs or handles at the left.
7. Leave by pressing (“Home”) at the bottom of your device.
8. Open “Threema” on your device.
9. Leave by pressing (“Home”) at the bottom of your device.

Have you been able to follow these steps on your Oppo F3?
👍  Yes 👎  No

1. Open the “Settings” of your device.
2. Choose “Battery”.
3. Choose “Others”.
4. Find “Threema” in the list of apps.
5. Next to “Background freeze” or “Freeze when in background”, make sure that the switch is turned off, i.e. with its knob or handle at the left.
6. Next to “Automatically optimize when an anomaly is detected”, “Abnormal apps optimization” and “Doze”, make sure that the switches are turned off, i.e. with their knobs or handles at the left.
7. Leave by pressing (“Home”) at the bottom of your device.
8. Open “Threema” on your device.
9. Leave by pressing (“Home”) at the bottom of your device.

Have you been able to follow these steps on your Oppo F3?
👍  Yes 👎  No

1. Open “Security Center” or “Security” on your device.
2. At the bottom, choose “Privacy permissions”.
3. Choose “Startup manager”.
4. Find “Threema” in the list of apps.
5. Next to “Threema”, make sure that the switch is turned on, i.e. with its knob or handle at the right.
6. Leave by pressing (“Home”) at the bottom of your device.
7. Open “Threema” on your device.
8. Leave by pressing (“Home”) at the bottom of your device.

Have you been able to follow these steps on your Oppo F3?
👍  Yes 👎  No

1. Open the “Settings” of your device.
2. Choose “Advanced settings”.
3. Choose “Battery manager”.
4. Choose “Protected apps”.
5. Find “Threema” in the list of apps.
6. Next to “Threema”, make sure that the switch is turned on, i.e. with its knob or handle at the right.
7. Leave by pressing (“Home”) at the bottom of your device.
8. Open “Threema” on your device.
9. Leave by pressing (“Home”) at the bottom of your device.

Have you been able to follow these steps on your Oppo F3?
👍  Yes 👎  No

1. Open the “Settings” of your device.
2. Choose “Apps”.
3. Choose “Advanced”.
4. Choose “Ignore battery optimizations”.
5. Find “Threema” in the list of apps.
6. Next to “Threema”, make sure that the switch is turned on, i.e. with its knob or handle at the right.
7. Leave by pressing (“Home”) at the bottom of your device.
8. Open “Threema” on your device.
9. Leave by pressing (“Home”) at the bottom of your device.

Have you been able to follow these steps on your Oppo F3?
👍  Yes 👎  No

1. Open the “Settings” of your device.
2. Choose “Notification panel & status bar”.
3. Choose “Notification center”.
4. Choose “Threema” from the list of apps.
5. Next to “Allow notifications”, make sure that the switch is turned on, i.e. with its knob or handle at the right.
6. Leave by pressing (“Home”) at the bottom of your device.

Have you been able to follow these steps on your Oppo F3?
👍  Yes 👎  No

1. Open “Security Center” or “Security” on your device.
2. At the bottom, choose “Privacy permissions”.
3. Choose “Auto-run management”.
4. Find “Threema” in the list of apps.
5. Next to “Threema”, make sure that the switch is turned on, i.e. with its knob or handle at the right.
6. Leave by pressing (“Home”) at the bottom of your device.
7. Open “Threema” on your device.
8. Leave by pressing (“Home”) at the bottom of your device.

Have you been able to follow these steps on your Oppo F3?
👍  Yes 👎  No

1. Open “Security Center” or “Security” on your device.
2. Choose “Data saving”.
3. In the top-right corner, if the switch is turned off, i.e. with its knob or handle at the left, there’s nothing left for you to do. Otherwise, proceed with the next step.
4. If “Threema” is in the list of “Trusted apps”, there’s nothing left for you to do. Otherwise, proceed with the next step.
5. At the bottom, choose “Add apps”.
6. Choose “Threema”.
7. Leave by pressing (“Home”) at the bottom of your device.

Have you been able to follow these steps on your Oppo F3?
👍  Yes 👎  No

1. Open the “Settings” of your device.
2. Choose “Application management”.
3. At the top, select “Installed”.
4. Find “Threema” in the list of apps.
5. Next to “Threema”, tap on the lock icon.
6. Leave by pressing (“Home”) at the bottom of your device.
7. Open “Threema” on your device.
8. Leave by pressing (“Home”) at the bottom of your device.

Have you been able to follow these steps on your Oppo F3?
👍  Yes 👎  No

1. Open the “Settings” of your device.
2. Choose “Battery and storage”.
3. Choose “Battery manager”.
4. Choose “Power consumption details”.
5. Choose “Optimize for excessive power consumption”.
6. Find “Threema” in the list of apps.
7. Next to “Threema”, make sure that the switch is turned off, i.e. with its knob or handle at the left.
8. Leave by pressing (“Home”) at the bottom of your device.
9. Open “Threema” on your device.
10. Leave by pressing (“Home”) at the bottom of your device.

Have you been able to follow these steps on your Oppo F3?
👍  Yes 👎  No

1. Open the “Settings” of your device.
2. Choose “Battery”.
3. Next to “Power Saving”, make sure that the switch is turned off, i.e. with its knob or handle at the left.
4. Leave by pressing (“Home”) at the bottom of your device.
5. Open “Threema” on your device.
6. Leave by pressing (“Home”) at the bottom of your device.

Have you been able to follow these steps on your Oppo F3?
👍  Yes 👎  No

1. Open the “Settings” of your device.
2. Choose “Sound & notification”.
3. Choose “App notifications”.
4. Choose “Threema” from the list of apps.
5. Next to “Block all”, make sure that the switch is turned off, i.e. with its knob or handle at the left.
6. Leave by pressing (“Home”) at the bottom of your device.

Have you been able to follow these steps on your Oppo F3?
👍  Yes 👎  No

1. Open the “Settings” of your device.
2. Choose “Apps”.
3. Choose “Threema” from the list of apps.
4. Choose “Notifications”.
5. Next to “Block all”, make sure that the switch is turned off, i.e. with its knob or handle at the left.
6. Leave by pressing (“Home”) at the bottom of your device.

Have you been able to follow these steps on your Oppo F3?
👍  Yes 👎  No

1. Open the “Settings” of your device.
2. Choose “Accounts”.
3. At the top right, tap on (three dots) to open the expanded menu.
4. Next to “Auto-sync data”, make sure that there is a checkmark in the checkbox.
5. Leave by pressing (“Home”) at the bottom of your device.

Have you been able to follow these steps on your Oppo F3?
👍  Yes 👎  No

1. Open the “Settings” of your device.
2. Choose “Apps”.
3. Choose “Threema” from the list of apps.
4. Choose “Permissions”.
5. Make sure that all switches are turned on, i.e. with their knobs or handles at the right, unless you have any specific objections.
6. Leave by pressing (“Home”) at the bottom of your device.

Have you been able to follow these steps on your Oppo F3?
👍  Yes 👎  No

1. Open the “Settings” of your device.
2. Choose “Battery”.
3. At the top right, tap on (three dots) to open the expanded menu.
4. Choose “Battery optimization”.
5. In the drop-down list at the top, switch from “Not optimized” to “All apps”.
6. Choose “Threema” from the list of apps.
7. Switch from “Optimize” to “Don’t optimize”.
8. Tap on “Done”.
9. Leave by pressing (“Home”) at the bottom of your device.
10. Open “Threema” on your device.
11. Leave by pressing (“Home”) at the bottom of your device.

Have you been able to follow these steps on your Oppo F3?
👍  Yes 👎  No

1. Open the “Settings” of your device.
2. Choose “Battery”.
3. At the top right, tap on (three dots) to open the expanded menu.
4. Choose “Battery saver”.
5. At the top, make sure that the switch is turned off, i.e. with its knob or handle at the left.
6. Leave by pressing (“Home”) at the bottom of your device.
7. Open “Threema” on your device.
8. Leave by pressing (“Home”) at the bottom of your device.

Have you been able to follow these steps on your Oppo F3?
👍  Yes 👎  No

1. There are many apps on the app store which claim to boost performance, free up space, save battery, or optimize the RAM of your device. However, these apps interfere with other apps, like “Threema”, and prevent them from working correctly.
2. If you have any app like “Clean Master”, “Security Master”, “Task Manager”, “Phone Cleaner”, “Super Cleaner”, “Power Clean”, “DU Cleaner”, “DU Speed Booster”, “CCleaner”, “AVG Cleaner”, “Avast Cleanup” or “Norton Clean”, check that it doesn’t block or terminate “Threema”.
3. If unsure, consider uninstalling the app claiming to “clean” or “boost” your device.

Have you been able to follow these steps on your Oppo F3?
👍  Yes 👎  No

1. If you’ve made any changes based on the advice above and you’ve adjusted the settings of your device, proceed with the next step. Otherwise, there’s nothing left for you to do.
2. Restart your device once. You can either choose the “Restart” option directly, if available, or turn off your device, wait a few seconds, and then turn it on again manually.
3. Open “Threema” once on your device – by tapping on “Threema” on your home screen or in the list of all apps.
4. Leave by pressing (“Home”) at the bottom of your device.

Have you been able to follow these steps on your Oppo F3?
👍  Yes 👎  No