On an Android smartphone, you’ll notice that the data network often changes from GSM to 3G or from 2G to 3G (UMTS) depending on the operator you take.
This phone signal behavior can be optimized in various ways:
To save battery, theoretically, it would be good to always have 2G reception because 3G consumes more.
With Android there are some strategies and a hidden menu where you can choose which data network to connect to preferably connect to and optimize data reception at any time depending on the case.
On an Android smartphone, any ROM you mount and any model (Samsung, LG, HTC or other), you can open the numeric keypad (the keypad for phone calls) and type the following code *#*#4636#*#** to enter the verification menu.
From here, tap on Phone Information to enter a technical information screen with a selection menu in the center.
Above the “Deactivate mobile phone signal”button, where “Set preferred network type” is written, you can tap and choose the mode in which the mobile phone should automatically choose the type of data connection and the type of signal it needs to receive.
How 3G/4G phone signal behavior can be optimized in various ways
The list is a long list of options (not all of them are clear, perhaps a mobile expert may be more precise):
WCDMA preferred: the GSM mobile phone is able to use both 2G and 3G with data connection, but even when the 3G signal strength is low, it remains favoured.
GSM only: The GSM mobile phone can only use 2G data communication.
If the 2G signal is low or absent, the phone does not take the line and obviously does not receive calls.
WCDMA only: The GSM phone can only use 3G UMTS data communication; if 3G signal is missing, the phone will no longer pick up and no longer receive calls.
GSM Car GSM (PRL): The GSM mobile phone is able to use both 2G and 3G and internet data, however when the signal strength is low the 2G is favorite.
CDMA Auto CDMA (PRL): The CDMA mobile phone is able to use both 2G and 3G and data communication, but when the signal strength is low the 2G is favoured (CDMA is the American network).
CDMA only: The CDMA smartphone can only use 2G data communication
EvDo only: for the CDMA smartphone, only takes in 3G.
GSM/CDMA car (PRL): For mobile phones with GSM and CDMA functionality, this option keeps the mobile phone attached to both networks.
The LTE options apply only to smartphones that connect to LTE data, in zones you’ll cover from LTE (which would be 4G).
The CDMA options are not to be considered so only the first 4 options are meaningful and can be used.
These configurations are preset differently depending on the type of mobile phone, but they must be changed so that you can both mirror battery, and make the mobile phone take better and optimize the signal and reception
If you have Three, you should use the preferred WCDMA option to keep your mobile phone connected to 3G as much as possible.
Those who never connect to the Internet should always keep 2G and never 3G to save battery power.
In areas with strong 3G UMTS reception, it is worth keeping WCDMA preferred if not WCDMA only (but be careful when moving) while in areas with weak 3G signal it is better to use GSM Auto, not to force your smartphone to try to connect to 3G network.
Setting up the auto GSM network (PRL) will greatly optimize battery life.
Unfortunately, there is no application that can automatically manage the transition from one configuration to another.
Among the applications to save battery life on Android is Juice Defender Pro version that can switch from one network to another depending on the reception.
To quickly access the hidden network information menu of your phone, instead of typing the code, you can download the Network Mode application.
With another simpler application, 2G-3G OnOff, you get a link to quickly enter Android’s settings menu and dictate the use of 2G when needed.