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Thread: HTC Droid Incredible - Verizon Signal Strength Issues

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    HTC Droid Incredible - Verizon Signal Strength Issues

    I have the phone named. Has a clean ESN with Verizon. I plan to port it to P+, but I am discovering the signal strength is horrible. I upgraded the radio to 2.15.10.07.07 - still no improvement. With a Pantech Breakout I have 2 bars inside; Incredible none and the roaming triangle. I can get two if I am under a tower. Any ideas before I return the phone? Would activation magically improve the reception?

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    More bars doesn't necessarily mean better reception. The dB per bar is not the same across different manufacturers.

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    Quote Originally Posted by ShortSxit View Post
    More bars doesn't necessarily mean better reception. The dB per bar is not the same across different manufacturers.
    +1. Bars are a meaningless, non-comparable expression of signal strength where the mapping between signal strength and bars varies between software releases on a given device, let along across different manufacturers. And furthermore, signal strength is a very poor indicator of the ability to handle a call on networks that put multiple sessions on the same frequency at the same time, as is the case for the technology Verizon uses. If you have a strong signal (lots of bars), but the channel is very busy, you can be out of luck, but on a quiet cell site, you may need almost no signal.

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    Quote Originally Posted by CharlesH View Post
    And furthermore, signal strength is a very poor indicator of the ability to handle a call on networks that put multiple sessions on the same frequency at the same time, as is the case for the technology Verizon uses. If you have a strong signal (lots of bars), but the channel is very busy, you can be out of luck, but on a quiet cell site, you may need almost no signal.
    Thanks, Charles. Your post should be a sticky. Would the same reasoning apply to data? If you can, reply in respect to 1x, EVDO, and LTE.

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    Quote Originally Posted by Steveanderson13 View Post
    Thanks, Charles. Your post should be a sticky. Would the same reasoning apply to data? If you can, reply in respect to 1x, EVDO, and LTE.
    The shared-channel issue definitely applies to systems that use a CDMA air interface, like 1xRTT or EV-DO, whether you are talking about voice or data. I am not entirely clear if LTE is in the same category, but I think it is. I think that LTE comes in both a code-division and time-division flavor, and Verizon uses the code-division flavor. Time division is where each session gets a slot of time for itself. Code division (the CD in CDMA) uses hairy signal processing to sort out multiple (the M in CDMA) signals on the same frequency at the same time.

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    Quote Originally Posted by CharlesH View Post
    +1. Bars are a meaningless, non-comparable expression of signal strength where the mapping between signal strength and bars varies between software releases on a given device, let along across different manufacturers. And furthermore, signal strength is a very poor indicator of the ability to handle a call on networks that put multiple sessions on the same frequency at the same time, as is the case for the technology Verizon uses. If you have a strong signal (lots of bars), but the channel is very busy, you can be out of luck, but on a quiet cell site, you may need almost no signal.
    Thanks. Very informative. But does nothing to resolve a roaming issue with Verizon coverage. If I turn roaming off, I have no coverage with the HTC phone; not so with Pantech. What I do not want to do is port a number to find out I will only have roaming with the Incredible. At least to me, this points to a hardware issue.

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    Here are the debug Rx engineering results:
    Rx Power: -99 to -102dbm
    Rx Ec/Io: - 6.5 to -12.5 db
    Rx FER: 0%

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    Quote Originally Posted by afnospam View Post
    I have the phone named. Has a clean ESN with Verizon. I plan to port it to P+, but I am discovering the signal strength is horrible. I upgraded the radio to 2.15.10.07.07 - still no improvement. With a Pantech Breakout I have 2 bars inside; Incredible none and the roaming triangle. I can get two if I am under a tower. Any ideas before I return the phone? Would activation magically improve the reception?
    It's more of a HTC issue I always had/have bad signal and it constantly goes from full to no service, I have had them on Verizon and T-Mobile.

    ^HSPA+ 42mbps---------------------------------------------- ^LTE

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    I think jarrodpd is right, I remember there were a lot negative reviews of the Incredible & Incredible 2 due to bad signal strength. A friend of mine had an Incredible and he could not even get a signal at my house which is in a fringe coverage area. However the Motorola's and even Samsung's we've owned over the years could all get a signal and most of them would hardly ever drop a call. LG's were a different story, we could make calls but the calls would frequently drop.

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    Quote Originally Posted by CharlesH View Post
    The shared-channel issue definitely applies to systems that use a CDMA air interface, like 1xRTT or EV-DO, whether you are talking about voice or data. I am not entirely clear if LTE is in the same category, but I think it is. I think that LTE comes in both a code-division and time-division flavor, and Verizon uses the code-division flavor.
    So with EVDO at least, one can have a strong signal and good or poor speed and likewise for a weak signal? Assuming the traffic is quiet (or rather, constant), does better signal correlate with better speed?
    Last edited by Steveanderson13; 06-26-2012 at 09:41 PM.

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    Quote Originally Posted by afnospam View Post
    Here are the debug Rx engineering results:
    Rx Power: -99 to -102dbm
    Rx Ec/Io: - 6.5 to -12.5 db
    Rx FER: 0%
    OK, now this is getting interesting. Checked *#*#4636#*#* to make sure CDMA was default. Check. *228, option 1, reboot. *228, option 2, reboot. No more roaming. ##33284 (##DEBUG) and select 1x Engineering. Rx levels changed:
    Power: -100 to -102dbm
    Ec/Io: -11.5 to -12.5 db
    FER: 2.23%

    Roaming gone (but no bars). Able to set to home only and still have dial tones to Verizon.

    So, me thinks there is a software issue. Question is, has it been fixed further. I'll install 2.15.00.08.08 and report back. Been at this too long tonight. But good news is incremental progress.

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    Good luck and sorry for thread jacking

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    Quote Originally Posted by CharlesH View Post
    The shared-channel issue definitely applies to systems that use a CDMA air interface, like 1xRTT or EV-DO, whether you are talking about voice or data. I am not entirely clear if LTE is in the same category, but I think it is. I think that LTE comes in both a code-division and time-division flavor, and Verizon uses the code-division flavor. Time division is where each session gets a slot of time for itself. Code division (the CD in CDMA) uses hairy signal processing to sort out multiple (the M in CDMA) signals on the same frequency at the same time.
    LTE is Frequency Division on the lower band classes - Verizon & AT&T (and Sprint, they're live in 1 city now I believe) are FDD... and Time Division on the higher band classes - Clearwire will be TDD.

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    Quote Originally Posted by afnospam View Post
    OK, now this is getting interesting. Checked *#*#4636#*#* to make sure CDMA was default. Check. *228, option 1, reboot. *228, option 2, reboot. No more roaming. ##33284 (##DEBUG) and select 1x Engineering. Rx levels changed:
    Power: -100 to -102dbm
    Ec/Io: -11.5 to -12.5 db
    FER: 2.23%

    Roaming gone (but no bars). Able to set to home only and still have dial tones to Verizon.

    So, me thinks there is a software issue. Question is, has it been fixed further. I'll install 2.15.00.08.08 and report back. Been at this too long tonight. But good news is incremental progress.
    Kind of a happy ending. For some odd reason, baseband 08 will not install. But I did install OpenSignalMaps and have confirmed that I am only connecting to Verizon towers with between 20-35% levels, but oddly I have a lot of bounce between towers with steady -101dbm. I know that -90dbm is just about the threshold for consistent reception, and the HTC is not cutting it. So good I found out before porting the phone. And just super advise from you all to watch the signal strength, not bars.

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