• 3G is slower than 4G
• 3G is used for cell phone calling, 4G is better for data usage
• 3G amps cost less than 4G amps
• If you just need it for calling, 3G will work fine
• If you use data on your phone instead of the Wi-Fi, you will want LTE/4G

• 3G uses a lower frequency, it can pass through walls and floors easier than LTE/4G
• 3G has better coverage than LTE/4G
• If you are using an LTE/4G amp, the indoor antenna placement is much more important than with a 3G system
• LTE/4G signal strength drops rapidly when passing through walls and floors
• When the LTE/4G signal drops below 1 bar, it will automatically switch to 3G

• Use more than 1 indoor antenna
• Use a more powerful amplifier
• Increase the incoming signal from the outdoor antenna

• 3-5 input level controls that you turn to adjust the incoming signal form the outdoor antenna
• Adjust these to the highest signal output
  – if the signal coming in is too strong (overdrives the amp) then turn it down until it is no longer overdriven
• Much less expensive than automatic gain
• Disadvantages:
  – cell signals fluctuate over time
  (due to weather, trees, cell tower changes)
  – times where it is not optimal, may not have the strongest possible signal

Automatically adjusts the input signal level, preventing the amp being overdriven and ensuring the signal is always the strongest

More Expensive than Manual gain.