These are some of the reasons that lead you to want to perform a reset, format, hard reset or factory reset of your Doppio SG401:
— My Doppio SG401 works very slow and I want to format it.
— I have forgotten my Doppio SG401 unlock pattern or screen unlock PIN code.
— The Doppio SG401 is hung or frozen.
— My Doppio SG401 does not have enough storage space to install applications.
— Clear all information from Doppio SG401 before selling or giving it away.
— Restore to factory settings my Doppio SG401
— My Doppio SG401 has trouble picking up calls.
Click the following link to see instructions on resetting Doppio SG401
Before doing a hard reset or formatting you should know that all the data and configuration of your Doppio SG401 will be erased and will be back as it came from the factory.
Doing a format should not involve any risk for your Doppio SG401, however you must follow all the steps correctly, the Doppio must have the battery fully charged and if possible it must be connected to the charger.
If something fails during the reset in most cases starting from the beginning and following the steps, the problem is usually corrected and the process completed correctly, but there is always a risk when performing a hard reset that depends on the state of the terminal and you must assess If you want to assume it or if you prefer to take your SG401 to a professional.
Doing a hard reset or formatting of Doppio SG401 will erase all data that has been stored since the first moment SG401 was launched.
That is, all the applications that have been installed will be deleted (applications that are pre-installed in the terminal will not be deleted), any configuration or customization of the terminal will be deleted.
Your Doppio will be unlinked from all social media accounts and services such as Google, Facebook, Instagram, mail or iTunes.
All chat conversations, messages, photos, videos, audios and files that were downloaded while using your Doppio SG401 will be deleted.
All this data will be deleted from the Doppio SG401 but if you have it linked to a cloud backup (iCloud, Google Drive) when you link your account to a new device and connect it via Wi-Fi all the data of the backup will be downloaded including the messages, chats, photos, videos, multimedia and browsing history.
First of all, we recommend that you make a backup copy of all your Doppio SG401 data either through a computer by connecting the SG401 via a cable and copying all the data through the file browser or a dedicated copy program security, using an SD card or the simplest method by backing up the cloud through a Google Drive, Microsoft One, Apple iCloud, Dropbox or Amazon Drive account.
Secondly, make sure that your Doppio has at least 800attery power and if possible keep it connected to the charger and the power while performing the reset tasks.
The Fortnite video game has the following requirements to work on a mobile device: minimum 3Gb of RAM, Android 8.0 or higher, GPU: Adreno 530 or higher, Mali-G71 MP20, Mali-G72 MP12 or higher and free internal storage space of at least 3GB.
The Doppio SG401 it has it comes from the factory with the Android 5.1 operating system.
Fortnite for Android cannot be obtained from Google Play like the rest of applications and games, since Epic Games decided to remove it from the Google application store to avoid paying 30 per cent commission for each subscription or purchase that is made in the video game. To get Fortnite in your Doppio SG401 you must download the installer accessing from the mobile device to epicgames.com/fortnite/android.
If you have forgotten the PIN code of your Doppio SG401 SIM card, do not enter the wrong code more than twice or you will block the SIM card. A hard reset will not take effect in this case, the only solution is to look for the PUK code that you must have on the plastic card where your SIM card came from, in case you cannot find it, contact your telephone company to provide you with the PUK code, With this code you can create a new PIN code. Do not enter a wrong PUK code or the SIM card will be unusable and you will have to request a new one from your telephone company.
If you have a Google account associated with your Doppio SG401 and you remember the password you can unlock your Doppio.
After several attempts to try to unlock the SG401, the phrase “Forgot your password?” Will appear in the lower left. or “Forgotten the password” click on it, now enter the password of your Google account and your Doppio SG401 will be unlocked.
Once unlocked you can change the unlock pattern or lock PIN code from the Android 5.1 operating system settings.
If you do not remember the password of your Google account you must use a computer or other device to try to recover the password through a secret question or a second email account, if it is also not possible to recover the Google password the last option to unlock your Doppio SG401 is to do a hard reset or factory reset so you will erase all the information stored in your and all its settings.
There are several methods to improve the speed of a SG401 from Doppio before resorting to acquiring a new model or resorting to more drastic methods.
Unlike a computer or laptop, we cannot expand the RAM of a Doppio SG401 from which comes by default so we have to look for methods to improve its performance.
1- Perform an unnecessary application cleanup. Check all downloaded applications you do not use and delete them.
2- Remove pre-installed applications. Your Doppio SG401 comes with pre-installed applications that you may not use and are taking up space in your memory.
3- Pass media files to memory card.
4- Keep your Doppio SG401 updated to the latest software version, Android 5.1 it is the version of the operating system with which it was released but possibly new versions have come out with performance improvements.
5- Try restarting your Doppio SG401
6- Install an antivirus or cleaning application.
7- As a last option you can perform a format, factory reset or hard reset of your Doppio.
The frequencies or bands of mobile telephony used in the United States are the following:
2G/GSM: GSM 850 MHz, GSM 1900 MHz.
3G/WCDMA: UMTS 850 MHz, UMTS 1900 MHz, UMTS 1700 MHz, UMTS 2100 MHz.
4G/LTE: LTE 700 MHz, LTE 800 MHz, LTE 1700 MHz, LTE 1900 MHz, LTE 2100 MHz, LTE WCS 2300 MHz (30), LTE 2500 MHz.
5G: 3100 – 3550 MHz (and 3700 – 4200 MHz).
The Doppio SG401 has a 2G connectivity:
A 3G connectivity:
4G / LTE connectivity:
The frequencies or bands of cellular telephony used in the United Kingdom are the following:2G/GSM: GSM 900 MHz, GSM 1800 MHz.
You can check if the Doppio SG401 works in the United Kingdom since it has a connectivity 2G:
A 3G connectivity:
4G / LTE connectivity:
On Android devices like the Doppio SG401 it is possible to quickly access emergency contacts without having to unlock the terminal.
First of all you must configure emergency calls on your SG401, for this you must go to the device settings and search under “Advanced functions” or “Security and privacy” section “Send emergency message”, “Contacts of Emergency” or “SOS Emergency” varies depending on the version of the operating system and the customization layer of Doppio.
Within this section you must configure the emergency contacts that you want to appear when activating the emergency call.
Once you have configured several possible ways to make the call depending on the software version, one possibility is by pressing the power key five times in a row (in some models it is activated with three consecutive keystrokes), in case this option does not work in The lock screen should show the emergency text at the bottom, click on the word “Emergency” and you will be able to access the emergency contacts.
Keep your Doppio SG401 updated it is very important especially to receive the latest corrections in security and to receive the latest news of the operating system as well as improvements in speed and battery performance.
Before updating the Doppio SG401 make sure you have a fully charged battery and be connected to a Wi-Fi network, since a large amount of data must be downloaded.
To update your Doppio SG401 you must go to Settings, this is the gear icon on the home screen of your Doppio, scroll down and click on “Software Updates” and then on “Check for updates”.
Step-by-step instructions to update Android.
To make a backup of your Doppio SG401 there are several methods.
The most economical method is to connect the Doppio SG401 to a computer using the USB cable and make a copy of the files using the file browser.
To perform a cloud backup you need a cloud backup service, on Android devices the default built-in service is Google Drive.
If what you want is to make a backup only of the photos and videos made with your Doppio you can use Google Photos, You will have all your photos and videos organized and you can configure it to be uploaded automatically at the time of capturing or uploaded all when connecting to a Wi-Fi network.
If your Doppio SG401 it does not turn on you must follow a series of recommendations to check what the problem is:
First connect the Doppio to the charger and to the electric current to rule out that it is a problem of lack of battery. If after one hour of charging the Doppio still does not turn on, proceed to the following recommendation.
Try to make a factory reset, you will lose all the data in the Doppio SG401 but you can recover them later through the iCloud backup.
If the Doppio SG401 does not react to factory reset is likely to be a battery problem, you can call a technician to replace the battery Li-Ion 1500 mAh from SG401, it is a relatively cheap solution.
If none of these methods have worked, it is likely that Doppio SG401 s has a broken motherboard or screen problem.
The Doppio SG401 does not have a water resistance certification so you should avoid coming into contact with liquids and creams.