I just noticed that when I put my hand around the bottom of the phone my signal drops by 2-3 bars and as soon as i remove it, it goes back up. I can do it over and over again. Just out of curiosity I tried this with my evo 4g and the signal doesn't change. I've seen a bunch of people reporting that their reception isn't as good as other phones with the 3d. could it be the antenna placement just like the iphone 4?
chase7545 said:
I just noticed that when I put my hand around the bottom of the phone my signal drops by 2-3 bars and as soon as i remove it, it goes back up. I can do it over and over again. Just out of curiosity I tried this with my evo 4g and the signal doesn't change. I've seen a bunch of people reporting that their reception isn't as good as other phones with the 3d. could it be the antenna placement just like the iphone 4?
Click to expand...
Click to collapse
Can't recreate it here. Wrapped both hands around my phone like I was strangling it, didn't do it.
Also tried as the post above...notta.
chase7545 said:
I just noticed that when I put my hand around the bottom of the phone my signal drops by 2-3 bars and as soon as i remove it, it goes back up. I can do it over and over again. Just out of curiosity I tried this with my evo 4g and the signal doesn't change. I've seen a bunch of people reporting that their reception isn't as good as other phones with the 3d. could it be the antenna placement just like the iphone 4?
Click to expand...
Click to collapse
I would recommend getting a bumper...
No, for real though, the iphone had the issue because the antenna was built into the actual outside of the phone, when your skin touched it, it would change the attenuation which caused the issue of poor reception. Our antenna is totally internal so this would not happen.
I think your holding it wrong. Seriously though I just did the same and was unable to recreate the issue. Might be defective.
Sent from my PG86100 using XDA Premium App
chase7545 said:
I just noticed that when I put my hand around the bottom of the phone my signal drops by 2-3 bars and as soon as i remove it, it goes back up. I can do it over and over again. Just out of curiosity I tried this with my evo 4g and the signal doesn't change. I've seen a bunch of people reporting that their reception isn't as good as other phones with the 3d. could it be the antenna placement just like the iphone 4?
Click to expand...
Click to collapse
My phone also does this I thought I was the only one that had.this problem.
chase7545 said:
I just noticed that when I put my hand around the bottom of the phone my signal drops by 2-3 bars and as soon as i remove it, it goes back up. I can do it over and over again. Just out of curiosity I tried this with my evo 4g and the signal doesn't change. I've seen a bunch of people reporting that their reception isn't as good as other phones with the 3d. could it be the antenna placement just like the iphone 4?
Click to expand...
Click to collapse
I have this problem too... Anybody claiming they don't have this problem are in a good coverage area. If you download the app open signal maps you can see the drop in dbm once you hold the device, it's very irritating
Mine does it to, very annoying.
I saw somewhere in another thread that the radio antenna is indeed on the bottom of the 3d. Dont know if thats confirmed or not. But it would explain the drop when covered by hands.
Sent from my PG86100 using XDA Premium App
THEGAMEPLAY94 said:
I have this problem too... Anybody claiming they don't have this problem are in a good coverage area. If you download the app open signal maps you can see the drop in dbm once you hold the device, it's very irritating
Click to expand...
Click to collapse
61% with nothing touching my phone.
70% with my hand covering the bottom.
56% with both hands around the phone.
I fail to see how this is like apple because EVERY PHONE loses signal when being touched. The problem with Apple's was that it dropped the calls.
Sent from my Shooter.
Yes, without anything it's at 80% and once I grab it it drops to 30%. The antenna does seem to be at the bottom unlike the 4G which was on the top.
And calls drop all the time.
DoctorComrade said:
61% with nothing touching my phone.
70% with my hand covering the bottom.
56% with both hands around the phone.
I fail to see how this is like apple because EVERY PHONE loses signal when being touched. The problem with Apple's was that it dropped the calls.
Sent from my Shooter.
Click to expand...
Click to collapse
My problem is that if I cover the upper part but well I almost never do that.
This needs to be recognized as a known issue since it has been brought up many times
I noticed the same thing but wierd thing is sometimes it happens and sometimes it doesn't.
I could recreate it for 15 tries in a row but then I closed the internet browser and moved the phone a couple inches and the problem stopped.
I will keep monitoring the signal while I grab the phone and see what happens. But yes it did happen when I grabbed the bottom.
Mine does it too...this is the only problem I have
Sent from my PG86100 using XDA Premium App
THEGAMEPLAY94 said:
This needs to be recognized as a known issue since it has been brought up many times
Click to expand...
Click to collapse
Its not a "known issue". It just so happens that this is a cell phone. Which has antennas. Which, when covered, loose reception. No way around that. Its the nature of cell phones.
Comparatively its like complaining that when in a lead lined room, you have poor reception.
Bamba1260 said:
Its not a "known issue". It just so happens that this is a cell phone. Which has antennas. Which, when covered, loose reception. No way around that. Its the nature of cell phones.
Comparatively its like complaining that when in a lead lined room, you have poor reception.
Click to expand...
Click to collapse
plus 1000
Sent from my Shooter.
The iphone issue was caused by them leaving the antenna exposed on the outside of the phone. Whenever you would touch it in a certain spot it would short it out and you would lose the signal.
Sent from my PG86100 using XDA Premium App
THEGAMEPLAY94 said:
I have this problem too... Anybody claiming they don't have this problem are in a good coverage area. If you download the app open signal maps you can see the drop in dbm once you hold the device, it's very irritating
Click to expand...
Click to collapse
i used that app and covered the phone up and nothing changed the only problem i have ever had is one of the cases i have blocks a little bit of my 4g signal but nothing else
xHausx said:
The iphone issue was caused by them leaving the antenna exposed on the outside of the phone. Whenever you would touch it in a certain spot it would short it out and you would lose the signal.
Sent from my PG86100 using XDA Premium App
Click to expand...
Click to collapse
While it may not be exactly like the iphone, could it be similar in the fact the antenna placement isn't optimal? I think that most people hold their phones toward the bottom where the antenna is where as on other phones like the evo 4g they wouldn't be covering the antenna by doing this. I just know I've seen quite a few complaints regarding reception so this could be a feasible reason why.
Related
Why is the Antenna on the bottom of the phone? I'll be holding my phone in an area with no bars and when I turn the phone upside down I will pick up 2 bars. I turn it back to normal and both bars go away. This is very annoying. Granted when I make a call the bottom of the phone is pointing up, BUT what about trying to download emails, or just holding your phone and trying to browse the internet.. I've seriously turned my phone upside down to do this.
As much as I love this phone, the Antenna on the bottom and the location of the micro USB slot might be enough to push me to the iphone 5 if it has a slide out keyboard.
What do you all think? Is it just me?
The antennas are at the top corners of the phone. If you take off the battery cover, you will see some gold prongs, those slip into the groves that are on the phone itself, Those are the antennas...
Jrocker23 said:
The antennas are at the top corners of the phone. If you take off the battery cover, you will see some gold prongs, those slip into the groves that are on the phone itself, Those are the antennas...
Click to expand...
Click to collapse
Those are the secondary antennas actually. The main battery is in almost every phone at the bottom, hence the external antenna plug on the TB is right under the kick stand.
milan03 said:
Those are the secondary antennas actually. The main battery is in almost every phone at the bottom, hence the external antenna plug on the TB is right under the kick stand.
Click to expand...
Click to collapse
Ok thank you for advising. good to know...
jsquared said:
Why is the Antenna on the bottom of the phone? I'll be holding my phone in an area with no bars and when I turn the phone upside down I will pick up 2 bars. I turn it back to normal and both bars go away. This is very annoying.
What do you all think? Is it just me?
Click to expand...
Click to collapse
I think it's probably due to RF emissions being a little less close to your brain; the evidence seems to go back and forth over the years re: cellphone antennas and brain tumors, so who knows?
milan03 said:
Those are the secondary antennas actually. The main battery is in almost every phone at the bottom, hence the external antenna plug on the TB is right under the kick stand.
Click to expand...
Click to collapse
Is that what that little rubber plug on the backside near the bottom is? I just noticed it for the first time today.
distortedloop said:
I think it's probably due to RF emissions being a little less close to your brain; the evidence seems to go back and forth over the years re: cellphone antennas and brain tumors, so who knows?
Click to expand...
Click to collapse
Hmmm, OK I love my Thunderbolt. (except for the micro usb location, the EVO has it on the bottom...I'm jealous.)
jsquared said:
Hmmm, OK I love my Thunderbolt. (except for the micro usb location, the EVO has it on the bottom...I'm jealous.)
Click to expand...
Click to collapse
Seems like the EVO is better in a few ways... The battery cover goes over the whole phone hence a flush cover for the extended battery...
Also and it's been out longer more assy's avab.
distortedloop said:
Is that what that little rubber plug on the backside near the bottom is? I just noticed it for the first time today.
Click to expand...
Click to collapse
Yup if you take it off the port is right under.
Does anyone know if you could connect an external antenna to get a little more consistent signal on the 4g. I get a signal but not that great at my house. If so what would i need?
Thanks
HTC phones for the last 3 years have all had the cellular antennas on the bottom of the phone. Most Nokia phones too. Just about every manufacturer has been doing this, minimize radiation to the brain.
The downside is your hand blocks signal so you have to learn to keep the bottom exposed to avoid signal attenuation.
RogerPodacter said:
HTC phones for the last 3 years have all had the cellular antennas on the bottom of the phone. Most Nokia phones too. Just about every manufacturer has been doing this, minimize radiation to the brain.
The downside is your hand blocks signal so you have to learn to keep the bottom exposed to avoid signal attenuation.
Click to expand...
Click to collapse
Keep your AT&T and iPhone problems to yourself
only problem is that cellphones don't release ionizing radiation so there is no danger for tumors. even if it did it would be about the same amount of radiation as eating a bananna once a day.
Ok so the antenna is at the bottom of the Thunderbolt... Mines not having any issues is yours?
Simple fix, install adw and enable
Full rotation
Flip the phone upsidedown wala
Sent from my ADR6400L using XDA Premium App
I'm not sure what's the issue with the antenna. I found reception on my Bolt to be exceptional.
no I love my sgs2 and so does every that holds it, ive a major issue that i thought was caused by switching from orange uk to o2 uk, but as it happens i have full signal when the phone is rested down... however when i pick it up it drops signal... more often than not the signal completely drops out as does the call and sometimes it just goes down to 1 bar... does anyone else have this problem? ive tried my o2 sim and my orange sim its the same for both... is it possible i have a defective handset ? weak radio ???
heres my quick vid to show you what i mean, apologies for the video quality... filmed on my bb9700
http://www.youtube.com/watch?v=9VthdB4V3D8&feature=channel_video_title
well the GSM and 3G antenna looks to be located in the bottom, back part of the device. so this seems like the exact place your hand would be covering when holding the phone, so i can easily see some significant signal attentuation happening with this phone.
i dont know where the antenna was located on the original galaxy s. but all phones i own always have attentuation. not much you can do about it i'd guess.
Applies to all wireless devices - signal transmits worse through your hand than through empty air. Rules of the universe.
However, I can't seem to replicate what you're seeing. In order for bars to drop, I have to block the entire bottom of my device using both hands. Holding it in one hand doesn't seem to be causing a drop for me.
But again : air > hand for signal transmission.
RogerPodacter said:
well the GSM and 3G antenna looks to be located in the bottom, back part of the device. so this seems like the exact place your hand would be covering when holding the phone, so i can easily see some significant signal attentuation happening with this phone.
i dont know where the antenna was located on the original galaxy s. but all phones i own always have attentuation. not much you can do about it i'd guess.
Click to expand...
Click to collapse
That's right, quick start guide shows the location of the antenna. If you look at the back of the device, the antenna is in the lower left hand corner, opposite the speaker.
When holding the device in your right hand, it should rest in your palm.
Actually holding the device in my right hand doesn't seem to be affecting my signal though, for some reason. I might just be in an area with good signal though (3 bars of h+, stays at 3 bars when holding it in 1 hand, drops to 1 bar when covering the device completely with 2 hands, and then changes to edge with full bars).
I just tested with my S2 and I had no problems whatsoever.
See my youtube channel (../user/Poppefieke) Can't post links yet.
I have some other S2 video's there too
i think sampullen who has been posting quite a few vids on youtube is going to cover this now too, see i hold my sgs2 in my left had for holding when im surfing etc but also when im on calls...
its good to hear some of you cannot replicate this, maybe mines faulty might try to exchange for a new 1 just to be on the safe side
OMG!
can more people confirm if this is real?
is it as bad as the antenna-gate issue from apple or no where as bad
Hey (samjpullen) here
I have been doing the tests like Sticky and have been getting some rather conflicting results to say the least.
I am not in the best area for Orange so i get a weak signal most of the time, when i do the test infront of my iMac and extra screen with the TV, Sky (you know the drill) on it seems to drop down from H with 1 bar, then down to 3G then down to G and then it can jump onto the Edge network (rathe strange)
But when i do this same test in other rooms e.g bathroom, other bedroom, even downstairs with the tv etc on it is fine!
So my guess is that it might be my rooms location and maybe all the electrical equipment within a small space.
AllGamer said:
can more people confirm if this is real?
is it as bad as the antenna-gate issue from apple or no where as bad
Click to expand...
Click to collapse
im hoping no where near as bad and im hoping that i was the only affected, one chap has placed a video reply to mine showing he doesnt have the issue which is good news, lets hope more can confirm im rather a 1 off and that if i replace this unit all will be well...... fingers crossed
cheers sam,
btw ppl follow sam on twitter, guys good!!!
http://www.gizmocrunch.com/android/7176-htc-sensation-4g-evo-3d-death-grip
"Tests carried out by NordicHardware show that the HTC Sensation 4G loses WiFi and Bluetooth strength when gripped in a certain way. Using a signal measuring app and regular audio apps, NordicHardware shows how the HTC Sensation 4G rapidly loses Bluetooth and Wi-Fi signal, even if its just sitting flat on the palm of your hand. The loss is substantial, with as much as 20 to 30 dBm down in connection speeds."
Will we see a similar issue with the evo 3d?
lmbebo said:
http://www.gizmocrunch.com/android/7176-htc-sensation-4g-evo-3d-death-grip
"Tests carried out by NordicHardware show that the HTC Sensation 4G loses WiFi and Bluetooth strength when gripped in a certain way. Using a signal measuring app and regular audio apps, NordicHardware shows how the HTC Sensation 4G rapidly loses Bluetooth and Wi-Fi signal, even if its just sitting flat on the palm of your hand. The loss is substantial, with as much as 20 to 30 dBm down in connection speeds."
Will we see a similar issue with the evo 3d?
Click to expand...
Click to collapse
The sensation's antennas are built into the back plate while the Evo's arent. Still, you would think HTC would have learned from apples mistakes...
I quickly lose Bluetooth connection on my Evo 4G when holding it in most positions. It cuts in and out just bouncing around in my pocket.
Seems like something you would test before you release a phone. Still surprised at what gets over looked.
Sent from my PC36100 using Tapatalk
So who holds their phone like that?
Not me!!!
Sent from my PC36100 using Tapatalk
xHausx said:
The sensation's antennas are built into the back plate while the Evo's arent. Still, you would think HTC would have learned from apples mistakes...
Click to expand...
Click to collapse
I don't have my pre-production EVO 3D, but a test Sensation 4G. I did the death grip 4 times, and nothing happened. I've never encounter that mistake on any HTC device I've had in my possession. Then again, why would I hold it that way? I take those test as if Apple are suffering with that mistake, Android devices must be suffering with it too. That's my opinion, because this is the first time I've even heard of this problem.
To quote the great Steve Jobs "don't hold it that way"
Sent from my PC36100 using Tapatalk
popular nobody said:
That's my opinion, because this is the first time I've even heard of this problem.
Click to expand...
Click to collapse
A lot of Android phones have this problem... Maybe not death grip but holding it sideways will lose reception with WiFi and even Bluetooth..
sent from anything but an iPhone
nate420 said:
A lot of Android phones have this problem... Maybe not death grip but holding it sideways will lose reception with WiFi and even Bluetooth..
sent from anything but an iPhone
Click to expand...
Click to collapse
Really? Let me try doing it with 4 different devices. Is it WiFi and Bluetooth both on, or is it separately?
Edit: Tried the Thunderbolt, Sensation 4G, Inspire 4G, Droid Charge, and the trusty EVO. WiFi and Bluetooth : no problems.
popular nobody said:
Really? Let me try doing it with 4 different devices. Is it WiFi and Bluetooth both on, or is it separately?
Edit:
Click to expand...
Click to collapse
Mostly WiFi... But the g2x and sgs4g does it with both.... That I've tested
Id say try separate
I rarely use Bluetooth and only noticed it on WiFi
sent from anything but an iPhone
mykrlz182 said:
To quote the great Steve Jobs "don't hold it that way"
Sent from my PC36100 using Tapatalk
Click to expand...
Click to collapse
yes!!!!!!! logic!!!!
Yeah, I really hope the Evo 3D doesn't have that issue.. that's just what I need--all my smug iPhone friends coming over and giving me crap.
Can we change the name of this thread to "death gripe"?
Sent from my secret place where no-one can find me.
Hi
Is anybody Else experiencing "deathgrip" issues with their S3?
Been all over the internet and found a few posts about the issue but nothing really helpful.
Any tips? Any ideas? Aside from using my phone upside down....
Sent from my GT-I9300 using XDA Premium HD app
Double post
Sent from my GT-I9300 using XDA Premium HD app
First I've heard of it so probably just people in a bad signal area and adding 2 and 2 to make 9.
I have 2-3 bars if it lays still on the table or I hold it upside down, if I hold it any way a normal person would it goes to hell.
This is in areas with poor reception but all tested numerous times in the same area. My girlfriend has a xperia s and she has no problem what so ever. My Nokia work phone also works flawlessly.
Sent from my GT-I9300 using XDA Premium HD app
randomher0 said:
Hi
Is anybody Else experiencing "deathgrip" issues with their S3?
Been all over the internet and found a few posts about the issue but nothing really helpful.
Any tips? Any ideas? Aside from using my phone upside down....
Sent from my GT-I9300 using XDA Premium HD app
Click to expand...
Click to collapse
Very strange, personally i'd be thinking some local interference, is this present everywhere or just at home??
Hmm. So far so good here. No drop in dB with my hand covering the bottom area/bottom back area(s) of the phone.
some people just absorb RF more than others.
this is something i've encountered a lot at work with people using wireless microphones, guitar wireless systems and in ear monitors. certain people just cannot use this stuff because their bodies just absorb so much of the RF that the gear becomes useless if their body blocks the signal in any way.
it's a nightmare to try to explain this to some idiot who just expects his wireless mic to work absolutely perfectly from 600 feet away in a field.
Baldilocks said:
Hmm. So far so good here. No drop in dB with my hand covering the bottom area/bottom back area(s) of the phone.
Click to expand...
Click to collapse
Same here.
Sent from my CM9 TouchPad
Mine is a nightmare it works fine in my right hand the moment I switch to the left my voice fades in and out and people cant hear me. The problem only seems to have happened since the software upgrade and my wifi is now much better than before so can't help feeling it's something the software has introduced
If you watch the S3 disassembly video you can see that it has several antennas, so I don't think the death grip is possible with this phone..
hefonthefjords said:
some people just absorb RF more than others.
this is something i've encountered a lot at work with people using wireless microphones, guitar wireless systems and in ear monitors. certain people just cannot use this stuff because their bodies just absorb so much of the RF that the gear becomes useless if their body blocks the signal in any way.
it's a nightmare to try to explain this to some idiot who just expects his wireless mic to work absolutely perfectly from 600 feet away in a field.
Click to expand...
Click to collapse
My colleague just suggested eating less spinach. That way you lower your iron contents in your body
Guess I absorb all RF coming my way then.
But my wi-fi has lower signal strength on my S3 compared to my old Incredible S too which made me want to ask if there was only me who had the problem
bra1nDeaD said:
My colleague just suggested eating less spinach. That way you lower your iron contents in your body
Click to expand...
Click to collapse
Then how do I deal with Bluto?
Did a test while checking the signal strenght. -89 dBm 12 asu holding the phone upside down, -103 dBm 5 asu while "death gripping" it.
I dont know how "audio db" translates to "signal db", but surely my signal can't be 32x worse while "death gripping" it?
(Rougly calculated on the basis that every 3 db indicates a doubling in signal strenght)
Sent from my GT-I9300 using XDA Premium HD app
Michael_P said:
Then how do I deal with Bluto?
Click to expand...
Click to collapse
Best.post.ever.
I'd like to re-bump this issue, seeing as how I experienced it too.
http://forum.xda-developers.com/showthread.php?t=1724070
This might be a poor signal on top of the issue seeing as how its not happening to everyone. I managed to replicate this three times with my hand on stopping all signal until its released and bars are back to full.
Go to settings - about device - status. Then take write down your signal holding it normally and upside down.
If you do this we can compare the change in signal strenght on our phones.
Sent from my GT-I9300 using XDA Premium HD app
Normal -84 dBm
Upside Down -85 dBm
No difference at all really.
Baldilocks said:
Normal -84 dBm
Upside Down -85 dBm
No difference at all really.
Click to expand...
Click to collapse
What kinda signal was that? 3G? I start to think that this is a problem in places with edge/gsm aka poor reception to begin with.
It also needs about a minute to update properly when checking the signal.
Sent from my GT-I9300 using XDA Premium HD app
Top way up -107 dBm 4asu
Bottom way up -103dBm 5asu
Gripped as described (death-grip), -103dBm 0asu
Thats HSUPA
Alright, I read the review on this phone and, after having the GalaxyS 1, I thought trying an HTC would be a great idea as my GS1 had extreme screen burn in; which led me to opt for an HTC instead of GS2 - the cheaper alternative of course.
I was pretty happy with this phone. Somewhat smaller than what I expected, though it runs fairly well with ICS and HTC Sense loaded.
Now the ridiculous issue. This phone has a severe case of 'death grip'. I've had quite a couple of frustrating weeks trying to figure out what on earth was causing the signal to drop completely from 2 or 3 bars to dead, when picking the phone up to text.
Before I considered googling 'hand signal absorb htc', or similar keywords to that effect, I tested my theory by holding the phone at the top two edges and then in my palm again; in the same position both times. The result? 5 bars to two bars, or even in some cases one bar. The signal where I live isn't excellent, however it's not terrible either. With my GS1 having no issue with signal drops. Just holding the Desire X in the palm of my hand, under the table results in complete signal loss.
This is an absolute joke. I've missed really important phone calls and the majority of sms's arrive late due the lovely signal loss regain repetition, essentially causing the phone do not receive calls, even though, provided it does have 3 or so bars.
So, am I the only one here who has this issue, or for that matter; a faulty phone? Really Really disappointed.
I do have a signal drop problem as I already wrote on another post and nobody answer:
"I have a lot of signal drops on GSM/EDGE and also 3G/HDSPA? The signal is full but, the phone is in stand by, the signal drops and I loose calls. Does anyone have this problem?
Also I noticed when the phone switches from 3G to GSM/EDGE first I have a no signal period (couple of seconds)."
I also had this problem with an LG Optimus 2x when updated to Android 4.0.4.
Dal2000 said:
Alright, I read the review on this phone and, after having the GalaxyS 1, I thought trying an HTC would be a great idea as my GS1 had extreme screen burn in; which led me to opt for an HTC instead of GS2 - the cheaper alternative of course.
I was pretty happy with this phone. Somewhat smaller than what I expected, though it runs fairly well with ICS and HTC Sense loaded.
Now the ridiculous issue. This phone has a severe case of 'death grip'. I've had quite a couple of frustrating weeks trying to figure out what on earth was causing the signal to drop completely from 2 or 3 bars to dead, when picking the phone up to text.
Before I considered googling 'hand signal absorb htc', or similar keywords to that effect, I tested my theory by holding the phone at the top two edges and then in my palm again; in the same position both times. The result? 5 bars to two bars, or even in some cases one bar. The signal where I live isn't excellent, however it's not terrible either. With my GS1 having no issue with signal drops. Just holding the Desire X in the palm of my hand, under the table results in complete signal loss.
This is an absolute joke. I've missed really important phone calls and the majority of sms's arrive late due the lovely signal loss regain repetition, essentially causing the phone do not receive calls, even though, provided it does have 3 or so bars.
So, am I the only one here who has this issue, or for that matter; a faulty phone? Really Really disappointed.
Click to expand...
Click to collapse
Sounds like a faulty antenna. Either that or you have lead hands.
It should be a cheap fix at any local repair shop or free if you take it back to the shop for a replacement.
Sent from my Nexus 10 using XDA Premium HD app
vogonpoetlaureate said:
Sounds like a faulty antenna. Either that or you have lead hands.
It should be a cheap fix at any local repair shop or free if you take it back to the shop for a replacement.
Sent from my Nexus 10 using XDA Premium HD app
Click to expand...
Click to collapse
What I don't understand is, when i'm on an actual phone call, there's no issue with quality or signal loss. Sounds like the phone rom is preserving the antennas power in idle mode?