4K has four times the resolution of Full HD and offers fantastic picture quality when you watch this resolution on your home TV.

If you want to take advantage of 4K video recording on your iPhone, you should make sure that you have the following settings for the camera app.

Adjust camera settings to record 4K video

1. Open iPhone settings.

2. Scroll down to "Camera" and select the item.

The following menu will appear:

• Change Camera Resolution iPhone

3. Tap Record Video

4. Select one of the following options:

• 4K at 24 fps
• 4K at 30 fps
• 4K at 60 fps.

Note: FPS stands for Frames per Second.

A higher value stands for smoother video playback. This means that 4K at 60 fps is the highest and most fluid video quality setting.

However, this requires almost 400 MB of memory per minute. If this is too much for you, then take the option 4K at 30 fps or at 24 fps.

If you want to record a large amount of 4K videos with your iPhone, we recommend you purchase a SanDisk iXpand Flash Drive for iPhone and iPad.

Now you know how to adjust the camera settings to record 4K videos.

If you want to take full advantage of the Slow Motion functionality with your iPhone and get the best slow motion effect, we'd like to tell you the right settings here.

For the latest iPhone models, you can choose between the following slow motion effects:

• 120 fps slow motion in 1080p
• 240 fps slow motion in 720p

To change the setting, please proceed as follows on the iPhone:

1. Open the iPhone settings

2. Scroll down to "Camera" and select the entry from Change camera resolution iPhone

3. Tap on "Record Slo-Mo video".

4. Now select one of the following options:

• 120 fps (frames per second) slow motion in 1080p
• 240 fps (frames per second) slow motion in 720p

5. Once you have made your choice, you can now create slow motion videos in the desired recording quality.

Note: The more frames per second (fps), the better the slow motion effect. You now know how to adjust the slow motion effect of the camera on the iPhone.

When you import photos and videos from your iPhone or iPad to a device that doesn't support HEIF or HEVC, you can't open these files, let alone view them.

Fortunately, there is an option that lets you change the format in which your iPhone records photos and videos:

To change the file format for videos and photos

1. Open Settings.

2. Navigate to "Camera".

3. Go to "Formats".

4. You now have the following options:

• High Efficiency
• Maximum compatibility iPhone file formats

5. Tap the one you want to use.

Note: 4K at 60fps and 1080p at 240fps require High Efficiency to be enabled.

High Efficiency uses the special Apple file format HEIF and HEVC for your photos and videos. Although they use less storage space for the same performance, they may not be compatible with older devices or Windows Pc´s.

Now you know how to change the file format for photos and videos taken with your iPhone or iPad from HEIF and HEVC to Maximum Compatibility, JPEG.

In recent years, Apple has made it increasingly difficult to completely disable Wi-Fi and Bluetooth on iPhone and iPad.

The reason for this is that Apple wants to make it easy to establish wireless communication with Apple Watch and AirDrop. So if you turn it off in the Control Center, Bluetooth or WLan will only be "disconnected" for paired networks or devices.

But the wireless connections remain active! As already mentioned for other functions such as AirDrop, Apple Watch or personal hotspot.

If you really want to switch off both W-Lan and Bluetooth completely on the iPhone and iPad, you have to proceed as follows and deactivate the options in the settings instead of the Control Center:

Instructions to completely disable W-Lan and Bluetooth on iPhone & iPad

1. Open the iOS

2. Navigate to "Bluetooth" or "Wi-Fi".

3. Manually turn off the function using the slider at the top.

This will now completely disable W-Lan or Bluetooth so that the wireless connection is really terminated.

You now know how to completely disable W-Lan and Bluetooth on iPhone.

Face ID didn't allow you to create multiple users. This has changed with iOS 12, because this version now offers at least the possibility to add a second person for Face ID.

Follow our step-by-step instructions to use this convenient feature on iPhone X, XS, XS Max and XR:

How to add a second person to Face ID

1. Open your iPhone's iOS settings.

2. Scroll down to "Face ID & Code".

3. Tap on "Set up an alternative display".

4. Let the person you want to add as a second user do the steps for the Face ID Scan. If it was successfully added, you will see a green checkmark.

You have now successfully added a second person. This person can now also unlock your iPhone X, XS, XS Max and XR via Face ID.

Info The SAR value is an important technical property of a smartphone, because it describes the specific absorption rate of the emitted hand radiation on the head and body.

If the SAR value is a decisive purchase criterion, then the following question about the iPhone Xs Max is very likely:

How high is the SAR value of the iPhone Xs Max?

We want to give you the answer to this question here:

The following values were measured by the American authority FCC for the iPhone Xs Max and given as an average SAR value in the protocol.

• SAR value on the head: 1,164 W/kg
• SAR value on the body: 1,171 W/kg

The iPhone Xs is thus below the limit value of 2W/kg, above which a harmful effect on the body is assumed.

The values in the mobile phone segment are average and not particularly good or particularly bad.

However, there are models that emit far less radiation than the iPhone Xs Max. If you also want to know how high the SAR value of the iPhone Xs is, please continue reading here.

The iPhone Xs belongs to the new Apple iPhone generation and is therefore of interest to many users.

If a decisive purchase criterion is the SAR value, then you are sure to ask the following question:

How high is the SAR value of the iPhone Xs?

We want to answer this question here: The following values were measured by the American authority FCC and given as an average SAR value.

• SAR value on head: 1,193 W/kg
• SAR value on body: 1,182 W/kg

This means that the iPhone Xs is below the limit value of 2W/kg, above which a harmful effect on the body is assumed.

You now know the SAR value of the iPhone Xs.

If you are also interested in the SAR value of the iPhone Xs Max, please continue reading here. SAR value of the iPhone Xs Max.

With CB Messages on the Samsung Galaxy Note 9, you will usually receive important information about current events in your area, such as weather warnings or disaster warnings.

However, Cell Broadcast messages are also used by network operators to distribute information about new products and rates.

So if you now receive 9 CB messages on your Samsung Galaxy Note that you don't want, it might make sense to turn them off.

Below we would like to explain how you can deactivate these messages:

Deactivate CB messages on the Samsung Galaxy Note 9

1. Open the SMS messages app on your Samsung Galaxy Note 9

2. Tap on the symbol with the three points

3. In the upper right corner. Select "Settings" here and then "Further settings"

4. Select "Broadcast channels". Deactivate the option by moving the slider from "On" to "Off".

You have just deactivated the CB messages on the Samsung Galaxy Note 9 and you should not receive any from this point on.

Please note, however, that some countries also send messages about earthquakes, tsunamis, etc. via CB messages.

So it might make sense to reactivate the CB messages while on holiday etc., like for example Hawaii!

If you display a detailed report on your iPhone under Settings --> Screen Time, then you may discover an hourglass symbol, the meaning of which you may not yet be aware of.

In addition, the hourglass icon may be orange or empty. Here we have summarized the meaning of the hourglass symbol for you:

Hourglass symbol orange or empty - meaning on the iPhone

Every application on the most frequently used app list has such an hourglass symbol listed next to it.

The hourglass icon is empty This app is not limited by a limit. This means that the application can be used without restriction by the user.

The hourglass icon is orange If the hourglass is filled orange, this means that you have set a usage limit for this app. Apps that are marked with an orange hourglass are also listed in the category "Marked with Limit".

You now know what an orange hourglass icon stands for in the list of used apps under "Screen Time" on the iPhone.

From the new iOS 12 version, it is possible to evaluate the screen time on the iPhone, or how one has used the smartphone.

For example, you can see which app was used for how long or how often you picked up your iPhone.

We would now like to explain briefly to you how you can display and evaluate the screen time on the iPhone from iOS 12.

1. Open the iPhone settings

2. Navigate to "Screen time"

You will now see various diagrams with information on how you have used your iPhone in the last 7 days.

The evaluation of the screen time should help you to monitor your smartphone usage better and maybe even to limit it.

For example, you can set time limits for the use of certain apps, which is useful if you want to restrict games for children on the iPhone.

It is also possible to set a timeout. For example at night. This ensures that children do not surf or play on their smartphone at night.

The screen time is a nice feature in any case. You now know how to evaluate the screen time on the iPhone and iPad from iOS 12 and how to set limits for children, for example.