What is a good signal strength for 4g?
The 4G LTE Signal should be greater than -58 dBm (e.g. -32 dBm). A value of -96 dBm indicates no signal. If the signal is between -82 dBm and -96 dBm, move the device to an alternate location (preferably an outdoor location). The LTE SINR should be greater than 12.5.
Android also covers a large swath of very strong signal with just the highest bar indicator. In case you're not familiar, signal is usually measured in dBm. dBm is the power ratio in decibels of the radio power per one milliwatt. A signal of -60dBm is nearly perfect, and -112dBm is call-dropping bad.
- Ideal Signal Strength
Signal Strength TL;DR -70 dBm Okay Minimum signal strength for reliable packet delivery. -80 dBm Not Good Minimum signal strength for basic connectivity. Packet delivery may be unreliable. -90 dBm Unusable Approaching or drowning in the noise floor. Any functionality is highly unlikely.
- In telecommunications, particularly in radio frequency, signal strength (also referred to as field strength) refers to the transmitter power output as received by a reference antenna at a distance from the transmitting antenna.
- Wireless signal strength is traditionally measured in either percentile or dBm (the power ratio in decibels of the measured power referenced to one milliwatt.) By default, CommView for WiFi displays the signal strength in dBm. The level of 1% is equivalent to the signal level of -95 dBm.
SINR/SNR – The signal-to-noise ratio of the given signal. RSRP – The average power received from a single Reference signal, and Its typical range is around -44dbm (good) to -140dbm(bad). RSRQ – Indicates quality of the received signal, and its range is typically -19.5dB(bad) to -3dB (good).
- SINR is a measure of signal quality as well but it is not defined in the 3GPP specs but defined by the UE vendor. It is not reported to the network. SINR is used a lot by operators, and the LTE industry in general, as it better quantifies the relationship between RF conditions and Throughput.
- RSRP – Reference Signal Received Power: RSRP is a RSSI type of measurement, as follows there are some definition of it and some details as well. It is the power of the LTE Reference Signals spread over the full bandwidth and narrowband.
- SINR/SNR – The signal-to-noise ratio of the given signal. RSRP – The average power received from a single Reference signal, and Its typical range is around -44dbm (good) to -140dbm(bad). RSRQ – Indicates quality of the received signal, and its range is typically -19.5dB(bad) to -3dB (good).
Dial *3001#12345#* and press the Call button. This will launch the Field Test Mode app and where the bars/dots were in the top left corner of the screen, you'll now see a negative number. The negative number is the decibel signal strength reading and should be followed by the carrier name and then the network type.
- Field test mode (FTM) or field test display (FTD) is a software application often pre-installed on mobile phones that provides the user with technical details, statistics relating to the mobile phone network and allows the user to run hardware tests on the phone.
- Here's how to change the signal strength indicator with a number rather than a signal bar:
- Launch the Phone app.
- Dial *3001#12345#*
- Then tap on the Call button, which will launch the Field Test app (or enter the field test mode).
- Now hold the Power button until the red slider (slide to power off button) appears.
- dB Gain, Your Smartphone's Best Friend. Cell phone signal strength is measured in decibels. Usually, -50 dB represents great signal (full bars) and -110 dB is virtually no signal (dead zone).
Updated: 6th October 2018