Mobile Booster signal sticker

Effective and perfect quality, great impact, such as 4ft antenna on your phone.
3.Improve the signal strength of mobile phones and reduce static electricity in boats, elevators, cars, buildings, tunnels and mountains. Works with all analog, digital and tri-band phones.
4.Easy to install, just peel and stick it inside the battery case.
5.Useful Phone Signal Booster: This cell phone signal booster can help you get rid of poor signal while traveling, climbing or taking elevators.