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Griffin ClearBoost Antenna Boosting Case for iPhone

3.0 out of 5 stars 38 customer reviews
| 3 answered questions

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  • Boosts your iPhone's antenna
  • More reliability, fewer dropped calls
  • Physical protection against bumps and scratches
  • Fits ONLY iPhones 1G and 2G. Does NOT fit 3G or newer phones
Currently unavailable. We don't know when or if this item will be back in stock.

Product Features

  • Size (LWH): 3.94 inches, 1.18 inches, 7.36 inches
  • Weight: 3.04 ounces
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Product Description

We all wish we could carry around an external booster antenna for our cellphones. ClearBoost lets you do exactly that for your iPhone. This clever case conceals a built-in booster antenna that captures more of the available wireless signal and sends it to your iPhone's internal antenna. The result is better reliability for your signal, especially in border areas' which translates to fewer dropped calls, wider coverage areas, and faster downloads. Nothing to plug in - just snap iPhone in ClearBoost's durable polycarbonate case. Your iPhone gets protection from real-world hazards, and its antenna gets a boost. Please note that this item only fits iPhones 1G and 2G. It will NOT fit 3G or newer.

Product Information

Product Dimensions 3.9 x 1.2 x 7.4 inches
Item Weight 3 ounces
Shipping Weight 8 ounces
Domestic Shipping This item is also available for shipping to select countries outside the U.S.
International Shipping This item is not eligible for international shipping. Learn More
ASIN B0017HEZFG
Item model number 8210-IPCLRBSTB
Customer Reviews
3.0 out of 5 stars 38 customer reviews

3.0 out of 5 stars
Best Sellers Rank #484,737 in Cell Phones & Accessories (See Top 100 in Cell Phones & Accessories)
#243,079 in Cell Phones & Accessories > Cases > Cases
Discontinued by manufacturer Yes

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Product Warranty: For warranty information about this product, please click here

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Customer Reviews

Top Customer Reviews

By Adrian Kirk on November 16, 2008
Verified Purchase
I ordered this product on the off chance it might actually work. Well, I can tell you it does help. I have tested it in many areas where I have had little to no signal in the past and the phone stayed connected with a signal about 70% of the time, which is a vast improvement over dropping my calls. HOWEVER, a dead zone is still a dead zone. This isn't a miracle, just a relay for the signal for where you cover up the antenna at the bottom of the phone with your hand when talking. If you buy this with realistic expectations and understand it helps prevent, not cure every dropped call, you will be pleased.
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Griffin's new case for the iPhone is supposed to be a twofer; a hard plastic case and an internal antenna that improves cell phone reception.

How does it perform?

The ClearBoost case is a two-piece (top and bottom) case that snaps together, encasing the iPhone snugly within. There's never a worry about the iPhone sliding out of the case, as can happen with slot-loading cases, as the two halves snap tightly together. In fact, you need a small screwdriver or a quarter to pop the two halves apart.

However, the hard plastic case material, while tough, is slippery. I was immediately struck by how smooth the case was; there was no sense of tackiness or grippiness to the material. I used the ClearBoost for a couple of days, and had it accidentally slip out of my hands more than once. Also, there is no belt clip, so the iPhone will have to live in your pocket or purse.

The main selling point of the ClearBoost case is improved cell phone reception. That's the "boost" in ClearBoost. Inside the bottom case is an unpowered antenna that sits firmly against the back of the iPhone outer shell when closed. I'm not enough of an electrical engineer to know how the induction works to transfer the signal from the ClearBoost's antenna to the iPhone, but Griffin says there is a marked improvement.

Part of the review package is a white paper telling reviewers how to access the iPhone's Field Test Mode to measure the cell tower signal strength. I tapped in the code (*3001#12345#*) and went to Cell Information.

I live a bowl-like depression in the foothills of the Catalina Mountains, in the northern part of Tucson, AZ. ATT's cell phone coverage is usable, but just barely.
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1 Comment 19 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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if ur looking for a antenna booster for ur 1st generation iphone.. look no further.. this does give it 1 to 2 more bars then usual.. but if have a 3g iphone dont even think of it.. cuzz it doesnt fit.
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This case completely altered my iPhone experience- so much so that I bought an extra one in case something happens to the original. As an early adopter of the iPhone, I was dropping every other call and couldn't figure out why my phone would fluctuate between one and four bars every three seconds. At the time I wasn't sure whether it was the phone or AT&T's service, but it got so bad that I nearly stopped using my phone entirely. I've since learned that the antenna is at the bottom of the phone and my hand was blocking reception. This case directs the antenna's reception upwards, where it should be. Since purchasing this case, my reception is 200 times better. Out of the dozens of cases out there, this is the only one that brings something new and worthwhile to the table- why else would you detract from the phone's looks?!
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Verified Purchase
Let me first say, I've only had it for a few minutes now, but I went from "No Service" to 3 bars by just placing the iphone in the ClearBoost case. My house is not AT&T friendly, nothing AT&T works in my house cell phone wise. Will post more after I've used it longer, but just the fact I can txt from home now has been worth the $8 for me.
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Griffin has underestimated how well their product works. I get at least a one bar improvement in reception. Now in my area ATT towers use the 850MHz that this case was designed for. Check out Griffin's website for instructions to test your own area's cell towers.

On the negative side it is an ugly case. It looks like the army designed it to be rugged. It is thick enough to make accessing the iPhone controls or swiping your finger more difficult. The nub antenna, however, has not been an inconvenience. It still fits in my pocket well.

The case comes with a plastic screen protector that is the worst part of the product. If the case is ugly, the screen protector is so much uglier that it distracts you from the case. The film they use expands with the heat of your pocket and creates bubbles in new places each day. It makes the iPhone appear to have contracted plague. I suggest you toss the supplied film and buy a ClearTouch Anti-Glare Screen Protector by BoxWave. The combination should work well.

I give it 4 stars because I live in a marginal reception area and I like the boost it gives me. And no one can see it when it's in my pocket.
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I bought this antenna hoping it would boost my iphone signal. The website for this product gives clear instructions on how to test this, and it didn't work. It actually reduced my signal quality.
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