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The iPhone 4 & 4S Signal Booster Guide

Have an iPhone 5?  Check out our Guide to iPhone 5 Signal Boosters.

Is it possible to boost the signal on my iPhone 4 or 4S?

Yes. A signal booster that employs a powered amplifier can significantly boost your cell signal.

Who uses cell phone signal boosters?

The FCC estimates that there are a million signal boosters in use every day, including in offices, homes and even in vehicles.

Can I boost my cell phone reception with an app?

Unfortunately not. Apps have been shown to not be effective at boosting cell signal.

Can I boost my cell phone reception with a sticker?

No, the stickers that you place on the back of your phone have not been proven to work, and have actually been labeled as a scam.

Find the Best Signal Booster for your iPhone

Use our product selector below to find the right cell phone repeater kit for your iPhone 4:

About the iPhone 4 and 4S

The iPhone 4 was a completely redesigned evolution to the iPhone 3G. It featured a stainless steel frame which also acted as the phone's antenna, as well as improvements to the camera, processor and other components of the iPhone. While there were some problems initially with the iPhone 4 antenna, those were fixed solved by Apple and future versions of the phone were defect free. The iPhone 4S was an improvement upon the iPhone 4, and included a much better processor, improved camera, and featured facetime and Siri on the phone.

What is a Signal Booster?

A cell phone signal booster is a system that receives a good signal in one area, amplifies it to be even better, and then broadcasts it to an area which does not have good signal. Cell phone signal boosters are used frequently in situations where materials in the construction of a house, office or vehicle prevent the cell signal from effectively reaching the phone, and provides the ability to circumvent these problem materials and provide a quality signal to the receiver.

Does the iPhone 4 or 4S Support 4G?

While the iPhone 5 does support 4G for increased data speeds, unfortunately the iPhone 4 and 4S do not support this technology. Thus, if you're looking to increase cell phone signal for your iPhone 4 or 4S, then you'll be looking to boost the 3G signal, with no need to boost 4G.

Support for 3G

The iPhone 4 and 4S phones both fully support 3G voice and data standard, so if you're having trouble with cell phone reception with either version of the iPhone, then you'll want to get a signal booster which boosts the 3G signal.