where do you mount the other part? I know to put the one one the roof

Exactly,Firechachi. The piece with the single, long, antenna goes outside. The othet piece goes directly over it (cover it) on inside of glass.

How close does phone need to be? Will it boost 25 feet from outside building to inside?

It doesn't boost the signal, it's a repeater for poor factory antennas and doesn't even do that! Not even the $300 ones give a bar where there isn't one and MIGHT be able to improve a bar where there is service already and is borderline! It needs to be within 2-3', 25' isn't possible without spending $400-$500. It's just something cheap and manages to sell countless numbers of them because people want better signal and think they can get it for $15.

I have service when I put my phone on the window. Will it help give me a signal in my room?

Maybe if you attach it in the window. I haven't had any luck with it. Tried it to boost signals for events that I do, and it did not work outside the car.

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Cell Phone Signal Booster Antenna for Verizon, AT&T, T-Mobile - Truck & Car Mount Passive Repeater for 5G, 4G LTE iPhones, Galaxies, Pixels

Cell Phone Signal Booster Antenna for Verizon, AT&T, T-Mobile - Truck & Car Mount Passive Repeater for 5G, 4G LTE iPhones, Galaxies, Pixels

Product ID: 82491984

Details

Antenna
5G LTE 4G 3G
Brand
Cellet
Color
Black
Impedance
4 Ohms
Manufacturer
Cellet
Maximum Range
3 Feet

📏Effective within 3 feet

📶5G/4G LTE compatible

🚗Easy stick-on car mount

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Description

📡 Drive Stronger Signals, Stay Ahead of the Curve

COMPACT DISCREET DESIGN - Slim black antenna fits perfectly on your rear window without disrupting your car’s style.
OPTIMIZED FOR VEHICLE USE - Designed specifically for trucks and cars, enhancing reception right where you need it most.
INSTANT SIGNAL ENHANCEMENT - Experience clearer calls and faster data speeds within a 3-foot range—stay connected on the move.
UNIVERSAL 5 G 4 G LTE SUPPORT - Boosts signal for all major carriers and top smartphone models, from iPhones to Galaxies.
SEAMLESS STICK ON INSTALLATION - No drilling, no hassle—mount it in seconds and keep your ride sleek.

The Cellet Cell Phone Signal Booster Antenna is a passive repeater designed for easy stick-on installation in vehicles, compatible with 5G, 4G LTE, and earlier networks. It supports major carriers like Verizon, AT&T, and T-Mobile, enhancing voice and data reception within a 3-foot range. Its compact design mounts on rear windows without drilling, making it a sleek, no-fuss solution for professionals seeking reliable connectivity on the road.

Specifications

ASIN	B07H9GTW3W
AntennaDescription	5G LTE 4G 3G 2G
Best Sellers Rank	#25,837 in Cell Phones & Accessories ( See Top 100 in Cell Phones & Accessories ) #28 in Cell Phone Signal Boosters
Brand	Cellet
Color	Black
Customer Reviews	3.1 3.1 out of 5 stars (1,222)
Impedance	4 Ohms
Item Dimensions L x W x H	1.75"L x 1.75"W x 8.75"H
Item Type Name	Passive Antenna Repeater
Manufacturer	Cellet
Maximum Range	3 Feet
Mfr Part Number	ACAR3A
Model Number	ACAR3A
Number of Channels	1
Number of Items	1
UPC	800768714368
Unit Count	1.0 Count

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€ 41.94

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In stock

Sold byAmazon AustriaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Austria.

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