4G LTE signal strength, like other cellular signals, is measured in decibels milliwatts (dBm). This measurement represents the power ratio in decibels (dB) of the measured power relative to one milliwatt (mW). Here’s a detailed breakdown of 4G LTE signal strength in dBm and what each range typically means:

Excellent Signal (-50 to -70 dBm)

An excellent signal strength, ranging from -50 to -70 dBm, is nearly the best you can achieve. This level of signal strength indicates that you are likely close to a cellular tower with minimal interference. Users in this range can expect optimal performance with fast data speeds, reliable connectivity, and clear call quality.

Good Signal (-70 to -85 dBm)

A good signal strength, falling between -70 to -85 dBm, is still considered strong and should provide a smooth user experience. Users can enjoy fast data speeds and clear call quality, making this range suitable for most everyday mobile activities.

Fair Signal (-85 to -100 dBm)

Fair signal strength, ranging from -85 to -100 dBm, is moderate or average. While users might still have a decent experience, there could be occasional issues such as slower data speeds or minor call quality problems. This range is common in areas with more physical obstructions or distance from the cellular tower.

Poor Signal (-100 to -115 dBm)

A poor signal strength, between -100 to -115 dBm, can be problematic. Users may experience dropped calls, slow data speeds, and general service unreliability. This range indicates significant distance from the cellular tower or substantial interference, impacting overall connectivity.

Very Poor/Dead Zone (-115 dBm and below)

At a very poor signal strength of -115 dBm and below, the signal is extremely weak. Making or maintaining a call or data connection can be very difficult or nearly impossible. This range is often referred to as a dead zone, where cellular service is highly unreliable.

Factors Affecting Signal Strength

It’s important to note that the above ranges are general guidelines, and actual user experience might vary based on factors such as network congestion, physical obstructions, interference, and the quality of the mobile device’s antenna. Various apps and phone settings allow users to check their current signal strength in dBm, helping them better understand their connection quality and address any issues.

Understanding these signal strength ranges can help users optimize their mobile experience, troubleshoot connectivity issues, and ensure reliable communication.