Cat® B15 Support

Find quick tips, suggestions and support on how to use your Cat phone to its full potential.

B15 FAQs

Browse the FAQs below to find quick answers to your questions and if you don't find the answer, please tell us.

How do I perform a factory reset?

Note: Before performing this activity ensure you have backed up and secured your data.
1. Go to the settings menu.
2. Scroll down this screen and select Backup & Reset.
3. Select the option "Factory data reset”.
4. Then tap "reset phone" and then “Erase everything”.
5. The phone will then reboot.

How do I resolve when poor sound quality is experienced, after being immersed in water?

1.If the handset has been subject to immersion in water then the microphone and speaker will need to dry out for them to resume to normal functionality.

How do I find my IMEI Number?

1. This can be found on the outside of the box that you received your phone in, and makes up part of the Approval's label.
2. The IMEI is also printed on the label inside the battery bay.
3. If the IMEI is not available, type *#06# into the device via the keyboard and a pop up box will show the device IMEI.

How do I know there is a device update available?

NOTE: When a new Firmware/Software is available, notifications are sent out to all Cat B15 devices.
On the home screen an Icon will show in the notification panel. When the icon appears you can drag down the notification panel and select.

To manually update:
1. Go to settings menu.
2. Scroll to the bottom of this screen, and select “About Phone”
3. Select the “System updates” option
4. Select the “Yes” option
The device will check the battery charge level and may ask you to further charge if required.

How do I turn On/Off predictive text?

1.  Go to the settings menu.
2.  Scroll down and select “Language & Input”
3.  Select the settings Icon to the right of the “Google Keyboard” option
4.  Scroll down and select “Auto Correction” then select the level of correction that you require.

How do I fix issues with the current APN settings?

Note: APNs are automatically set by a system application called Tweakker. Tweakker can be overridden if you are experiencing problems due to incorrect APN settings.
1. Go to the settings menu.
2. Scroll down and select “Apps”.
3. In the Apps window, drag the screen until you reach the “All” tab, scroll down until you reach Tweakker and select.
4. Select "uninstall updates".
Note: If the Tweakker App does not give the option to uninstall updates please skip to point 7.
5. Select OK.
6. Once updates are uninstalled select OK.
7. Select Tweakker, select disable you can now manually install the APN settings, as per Network provider details.

How do I enable/disable Bluetooth and connect to Bluetooth tethering?

Note: Bluetooth tethering is subject to being included in your data package with your Network Operator.
On the device:
1. Go to settings menu, enable/disable Bluetooth.
2. Select “More”
3. Select “Tethering and Portable Hotspot”. There are 3 options: USB tethering, Bluetooth tethering and Hotspot & tethering settings.
4. You need to ensure “Bluetooth tethering” is ticked, return once more to settings window.
5. Select Bluetooth and select to make your device discoverable.

Next steps:
1. On your PC/Lap top search for Bluetooth devices
2. Select your device and connect to it.
3. Once your device is connected and the drivers are successfully installed, click on your device from the list of connected devices.

How do I pair to another Bluetooth device?

1. Go to Settings menu.
2. Beneath the Wireless and Networks settings you can see the Bluetooth Tap On.
3. Then select Bluetooth by tapping on Bluetooth.
4. At the bottom of this screen will be the legend “Search for Devices”.
5. Select the device you wish to connect to in the list displayed.
6. Confirm the passkey shown on your device and the device you want to pair with is the same and then select “Pair”.

How can I transfer data to another device via Bluetooth (for example an image)?

1. Go to Gallery menu.
2. Select the folder that contains the file that you wish to transfer.
3. Select the image that you intend to forward, select icon at the top of the page, select Bluetooth.
4. Select the device to send to and send

How do I copy contacts from the SIM card to the Device?

1.  Go to the “People” App.
2.  Select Menu and then select “Import/Export”
3.  Select the SIM to copy from, select next.
4.  Select the location to copy to “phone contact” select next.
5.  Tick the contacts to copy, or press “Selected” then ‘select all’
6.  Select “OK” to start the copy.

How do I enable/disable Wi-Fi and connect to a Wi-Fi service?

1.  Go to the settings menu, select Wi-Fi to enable/disable
2.  Select Wireless and Networks and then tap on Wi-Fi.
3.  This will display the Wi-Fi Access points (AP) within range of your device.
4.  Select the Wi-Fi AP that you intend to connect to, in general this will require Password access before you can connect to that network. Input correct Password and the device will connect to the Network.

How do I Clear the cache and browser History?

1.  Go to the settings menu.
2.  Select the Menu icon bottom left of the device screen
3.  Select settings and select “Privacy” option
4.  Select menu and then select “Clear browsing data”.
5.  Ensure that “Clear the cache” is selected and then tap clear button.

How can I back up data to an external storage device?

On your Cat B15
1.  Go to File Manager App
2.  Ensure the device has a viable and formatted SD card installed.
3.  In the File Manager screen, Select “Phone Storage” option, in this example select a folder containing an image, and open the folder.
4.  Identify the image you wish to backup, at the bottom of the screen select the menu option in this there will be three option press “Select file or folder” and then tap on the image to be saved.
5.  At the top of the screen the image will indicate ‘1 or more selected’ at the bottom of the screen a number of icons are displayed, select the icon that appears to be two sheets of paper over lapping. This will copy the image.
6.  At the top of the screen drag the screen from left to right, and select the home Icon, the screen will return to the storage home page, select SD card.
7.  The folders currently held on the SD card will be displayed, select the destination folder.
8.  Once more at the bottom of the screen will be a number of icons, to save the image in this folder select the clipboard, this will paste the image in the folder.

What does the Message please Insert SIM card indicate?

1. Make sure that you have correctly inserted the SIM card – In the battery bay is an illustration of the required SIM card orientation. IMPORTANT NOTE – If using a Micro SIM use a SIM adaptor to ensure the correct location. Never insert the SIM adaptor without the SIM card, as the connectors will be damaged.
2. If correctly fitted and the message is still displayed, please clean the contacts of the SIM card using a dry cloth.
3. If still not being recognised please call your Network provider to ensure the SIM card has been enabled or to check if they have any further instructions.

Why do Calls to this device get picked up by other devices?

1. Go to the phone menu and select settings.
2. Select Voice call, select call forwarding
3. Check if the “Always forward” option is enabled, if this is the case disable. In this screen there are three further options “forward when busy”, “Forward when unanswered” and “Forward when un reachable”.
4. Enable/Disable the functionality you desire.

How is Caller ID enabled/disabled on this device?

1. Go to the phone menu and select settings.
2. Select Voice call option
3. In this screen scroll down until reaching “Additional settings” and select “Caller ID”.
4. A pop up window will appear with three options, “Network default” select this if you are aware of what the default of the Network is and if that is what you require.
5. “Hide number”, check this is not set as this will prevent the caller ID being displayed at the receiving device.
6. “Show Number”, select this to ensure Caller ID is displayed at the receiving device.

What should I do if the device displays message “No Service”?

1. This may be displayed if you are in an area that is not covered by your Network provider, or if you are in an area of poor reception for example an enclosed area.
2. No service will be displayed on your screen until the situation is resolved by relocating to an area of service.
3. If this problem persists when in a known good service location, contact your Network provider to ensure there are no restrictions on service or your SIM services.

What do I do if “Emergency Call only” is displayed on your Home screen?

1. This will be displayed if there are issues with the SIM card
2. Additionally if you are in an area not covered by your Network Provider but covered by another Network provider.

What do I need to do if “Enter PUK code” is displayed?

1. Following three consecutive failures to input the correct SIM card PIN code, the PIN code will be blocked and the request for the PUK code will be displayed.
2. Before attempting to input the PUK code ensure that you have the correct code provided by Network provider.
3. After ten unsuccessful attempts to input the PUK code, the SIM card will be permanently disabled.
4. Once the SIM card is permanently disabled you will need to contact relevant body to purchase a New SIM card.

What should I do when experiencing Reception Issues?

1. Poor quality of calls: Please check if the volume of the device is adjusted to an acceptable comfortable level.
2. When the device is used in the areas with poor signal, e.g. near the high buildings or in basements, the call quality may be affected adversely.
3. When this device is used in a high call intensity period, like the rush hours, call failure may be caused by network congestion
4. Standby time is reduced, Standby time is related to the system setting of network, it may be that the phone is used in an area with poor signal. Where there is poor signal, the phone will constantly attempt to communicate by searching for base station signal and battery will lose charge quicker, hence the standby time is reduced.

How do I resolve when Poor Sound Quality is experienced?

There are a number of contributing factors which can affect the audio performance of your device for example:
1. If the handset has been subject to immersion in water then the microphone and speaker will need to dry out for them to resume to normal functionality.
2. If the incoming call has been routed long distance and is being routed through a number of service providers telecoms infrastructure.
3. Technical performance between handset manufacturers, this can be software or hardware related.
4. The environment the handset is used in, especially where there is background noise, typically traffic in a busy city environment or large shopping malls and airports.
All handset manufacturers must design equipment to work within very rigorous standards set by organisations like the European Union for example, these are normally safety based so that you do not suffer from hearing problems with extended use. All Cat products meet these safety standards and hence are CE marked as an assurance that we comply with these standards and our audio levels are within safe limits.



Removable Lithium Ion
Talk Time*
10 hours
Standby Time*
23 days


Display Type
2.2″ QVGA TFT, 240×320
Display Cover


3MP, fixed focus, 4x digital zoom
Video Capture
Yes, QVGA 30fps


Audio Jack
micro-USB 2.0
Sim Type
Mini sim

Data Speed

Maximum Downlink Data Rate
384 Kbps
Maximum Uplink Data Rate
384 Kbps


ROM Flash
128 MB
64 MB
Extended Storage
microSD™ up to 32 GB


Audio Playback
Audio Recording
Video Playback
3GP, MP4
Video Recording


2G Frequencies
850/900/1800/1900 MHz
WCDMA/UMTS/Data 3G voice
3G Frequencies
900/2100 MHz
4G Bands (LTE)


Processor Type
Media Tek MT6276W
MTK NUCLEUS (version 2.1)


IP Rating
IP67 Certified
Up to 1m for 30 mins
Dust Proof
Impervious to dust
Drop Test
Up to 1.8M (6 ft)
Military Standard
MIL-SPEC 810G, Shock and Drop, Operating Temp: -25°C (-13°F) to 55°C (131°F), Category 4 vibration


Proximity Sensor
Ambient Light Sensor


123.5 x 56 x 17.5mm


Contact our Customer Service team



In the unlikely event of an in-warranty fault, contact our Customer Service team who will be happy to help