[The_Neon_Cowboy]

Cell phone boosters that look like the ones sold here ...

http://www.nodroppedcalls.com/

They look like this...



supposed to work like this......

The Cell Phone Internal Antenna is a passive device designed to capture stray radiation within the phone and re-radiate the signal to improve the phone's performance.


they apear to be a gold painted sticker that does nothing ..Bingo!!! Thats what they are just a stupid sticker that does nothing. No part of the ant circuity passes through the battery compartment! Underneth the back houseing (metal or plastic) were the sitcker would rest lies very sensive chips useally coverd by steel shields to help protect from interference. If anything the sticker if if truly does what it says it does "capture stray radiation within the phone " then if anything probubly couseing more problems than before ... or mabe damage the phone... but I don't see that happening eather

part the antenna circutry is under those upper shields (inside the phone), the only exposed ant circutry is twards the very top of the phone! (where the sticker isn't)

I love this statement.....................

Significantly Improve your cellular phone's signal and reduce static with this easy to install cell phone internal antenna. Works on all cell phones. Especially analog, digital and tri-band phones.

really? there is mabe 1 or 2 phones with internal antannas that might acually benifet at all from the sticker but I have never seen one.....

what do you guys think of these things most cell phone shops sell them form $.99 to $19.99 ea

[-={420}=-]

I had one of these once, but I stole it and it didn't do shit so I just threw it out.

[sinjin]

i've sold a few dozen over the past couple years...no one has ever tried to return them or complain about lack of signal enhancement....but maybe they were just embarrassed.

[craig5320]

Originally posted by sinjin
i've sold a few dozen over the past couple years...no one has ever tried to return them or complain about lack of signal enhancement....but maybe they were just embarrassed.

The mystery behind sinjin deepens! hey watch my prostate!

[brc64]

I bought one (it was $1, I figured I'd give it a try). I did a side-by-side comparisson with my phone (with signal booster) and a friend's phone (same model phone, same service) in his house where there's usually not much of a signal at all. I had two bars of signal stength (out of six) and he had one.

They definitely don't work as advertised, but I guess they work a little bit. I wouldn't pay more than $1 for one, though.

- Me

[The_Neon_Cowboy]

Originally posted by brc64
I bought one (it was $1, I figured I'd give it a try). I did a side-by-side comparisson with my phone (with signal booster) and a friend's phone (same model phone, same service) in his house where there's usually not much of a signal at all. I had two bars of signal stength (out of six) and he had one.

They definitely don't work as advertised, but I guess they work a little bit. I wouldn't pay more than $1 for one, though.

- Me

but you dont get it the phone arent the same even though you think they are! there are diffrent revisions of boards.. diffrent flex (software versions) that would shock you to see the changes the upgrades are like going from dos to windows xp ... thier huge diffrences each update... then you have the prl (roaming list) those get updated to the prl lists all the signals the phone can use like it specifies.. analog, cdma (low band),PCS (digital/high band)
then the channels the phone sould use.. my mom's cell when I upgraded it for her when from 1 bar of service in the house to five bars full service.. couse even thou her pohne was 1 year old the softwae it was about 2-3 years old!!

----------example---------------

for eample your prl list 325,375.425,675
then you frends might list 325,425,675

well there could be alot stronger sevrice on channel 375 but your friends phone doent have it listed for it to use...so his phone is force to lock on to the strongest service on a channel it has avilable to it! wich is apparently a weeker signal on a diffent chanel
-----------------------------

so really you were compairing two toataly diffrent phones just like compairng two computers with diffrent OSes, or two cb radios 1 with 13 shanels and one with 135

------

cell phone are alot like cd radios really .... they even use the same kinda test equipment to test them

[merry]

The real way to measure... if your phone has something like Nokia's "Net monitor"... check some "fan sites" on the net, might find it.

Nokia phones have a hidden menu called "Net monitor", it can be enabled via PC software. It is not "official", and not documented, but you can find some info (and s/w) at enthusiasts on the web. Once enabled, menu 01 shows signsl strength -n dBm, (top center figure). Menus 03, 04, 05 show prl (left column) and corresponding signal strengths (middle column - not sure). Menu 20 shows batt. voltage and temp, plus Tx power (when transmitting, i.e. during calls, else it's xxxx).

Anyways, if you can find something similar for your phone brand, activate it, than do several readings (five or more) with and without the booster, then average results. Real world figures should be like -80 (all bars on) to -100 (all off) dBm (if >100, the "minus" is not displayed on my phone).

My guess is you'll get the exact same average, meaning the thing is useless.

[Matth]

A friend told me the bar scale does not actually measure signal strength as such, but maybe something else... the received error rate (inverse) was what he said (and he works for NTL).

These gizmos, I suspect, may increase OR decrease signal strength, or create some directional effects, if they do act as a passive re-radiator.

One possible benefit, might be more ground plane effect.

To be honest, given the bizarre shape, I couldn't even calculate if their supposed resonant frequency is anywhere near - and there are 3 possible bands - the UK 900/1800 GSM/PCN, and the US 900/1900

[The_Neon_Cowboy]

Originally posted by Matth
A friend told me the bar scale does not actually measure signal strength as such, but maybe something else... the received error rate (inverse) was what he said (and he works for NTL).

These gizmos, I suspect, may increase OR decrease signal strength, or create some directional effects, if they do act as a passive re-radiator.

One possible benefit, might be more ground plane effect.

To be honest, given the bizarre shape, I couldn't even calculate if their supposed resonant frequency is anywhere near - and there are 3 possible bands - the UK 900/1800 GSM/PCN, and the US 900/1900

the rssi bars?
Ahh your mean the Radio Signal strength Indiacator I though that what it's named I'll have to go look it up now..... I thought its reading is dependend on signal stenth... mabe it's erprs but eather way wen I turn down the siganl on my call tester I watch the bars drop yet there are no lost frames 0% FER no error so it has to be based on siganal strength ... at least here in the us (dont forget diffrent regions also have diffrent software, so I couldn't tell ya)

cant be too great wedged between steel and a layer of plastic on one side and a layer a pastice and a NiCad Battery then a steel outer houseing (or plastic)

sombody said some thing about the phones get hotter faster with those things (Never herd of that one myself)