08-27-2014 02:10 AM
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  1. apoc527's Avatar
    Hi all,

    I looked a good 6-7 pages back in the forum as I thought I had seen a thread, but perhaps I was mistaken.

    Anyway, I've noticed that sometimes my phone will get quite warm and this has been coinciding with a severe drop in battery performance. I'm suspecting the cause is a background app, probably EchoEcho, but I'm not certain. I'm going to charge up and turn that app off and see if that does the trick.

    The only other time I've noticed a heat build-up is when I took my phone into a locker room, stuck it in a locker and came back about 40 min later. That area is notorious for very weak cell signal, so I'm thinking that the phone got hot trying to find reception.

    Has anyone else noticed this and found a way to resolve it? Or is my phone defective? I didn't notice any heating up the first 5 days I owned it, so it's a little disconcerting.
    04-14-2012 06:35 PM
  2. ninjaap's Avatar
    I've noticed excessive warning, once in a while, on every single smartphone I've owned. It could be from various things, like background apps or using your phone while plugged into a charger. If the phone doesn't turn off, then it's not overheating.
    04-14-2012 06:44 PM
  3. apoc527's Avatar
    I'm used to an iPhone 4 in an excessively thick case, so it could be I'm just not used to it.
    04-14-2012 06:47 PM
  4. ratfester's Avatar
    My gets pretty warm and the battery goes quick playing Wordament, which is weird since it's just a bunch of letters on the screen, doesn't seem like it would be too intensive.
    04-14-2012 06:48 PM
  5. alias3800's Avatar
    Just the simple act of tethering will make the phone warm, almost uncomfortably so. Gets worse after a while
    04-14-2012 06:50 PM
  6. alias3800's Avatar
    Just the simple act of tethering will make the phone warm, almost uncomfortably so. Gets worse after a while
    04-14-2012 06:59 PM
  7. Tallguy0187's Avatar
    I seem to have the same issue. The phone gets crazy hot and battery life starts to drop.
    I can't seem to figure out when it starts.
    04-16-2012 05:10 PM
  8. jimski's Avatar
    Several days the past week I used mu L900 for 5-6 hours straight, with a portable USB charger tethered to it, and no excess heating. Only got slightly warm. No issues.

    Sent from my Lumia 900 using Board Express
    04-16-2012 06:00 PM
  9. nokia4life's Avatar
    i think all smart phones suffer from this. i only notice warming when GPS is on and while playing games for an extended amount of time and i have seen this on every smartphone that i''ve owned. also notice you get the same warming from your laptops and computers they just have fans to scatter the heat around phones don't. those processors get warm.
    04-16-2012 08:07 PM
  10. tenoclock's Avatar
    Mine's doing the same thing. I first noticed when I was driving through a canyon where there's no cell phone coverage. The phone gets really warm in the pocket I have to take it out. The second and third time i noticed was when I walked into buildings with low to weak coverage (but still has signal). I'm suspecting it's something to do with how phone handles the receptions. I'm debating if i should return the phone just in case it's a hardware issue.
    04-19-2012 12:58 AM
  11. jsntrenkelr's Avatar
    I haven't noticed any heat other than than the normal warm that all my recent smartphones have achieved, but man do I love this phone.

    Sent from my Lumia 900 using Board Express
    04-19-2012 01:25 AM
  12. HifiGuy900's Avatar
    My Lumia works fine but my wife's cyan lumia was becoming real hot (not warm). After the update it was better but I swapped it nonetheless for a newer one to be on the safer side. the one works fine.
    04-19-2012 01:42 PM
  13. waynejk's Avatar
    Bump? Did anyone find a "fix" for this? I recently switched to a cyan Nokia 900, coming from a Focus S and before that an HD7, and have not experienced this before. I've had to power cycle the phone a few times during the course of a single day as well. The most problematic was driving thru a low coverage area when my phone got noticably warmer and the battery maybe lasted a total of 6 hours. Only had it for a week or two, should I exchange it?
    05-21-2012 01:26 AM
  14. apoc527's Avatar
    Only had it for a week or two, should I exchange it?
    Yes. You just have one of the remaining lemon units. It definitely should not do that. My replacement works great and I love the phone more than ever.
    waynejk likes this.
    05-21-2012 09:02 AM
  15. waynejk's Avatar
    Yes. You just have one of the remaining lemon units. It definitely should not do that. My replacement works great and I love the phone more than ever.
    Thanks for the advice apoc527! I swapped my phone today for another cyan Lumia 900 and already the new one is MUCH better. I don't even have the purple keyboard anymore. Granted it's only been about 10-hours (placebo effect?) but it seems more responsive and more stable altogether. *knocks wood* I was regretting the switch from the Focus S, but now I'm not. :)
    05-22-2012 01:21 AM
  16. socialcarpet's Avatar
    i think all smart phones suffer from this. i only notice warming when GPS is on and while playing games for an extended amount of time and i have seen this on every smartphone that i''ve owned. also notice you get the same warming from your laptops and computers they just have fans to scatter the heat around phones don't. those processors get warm.
    This.

    It's normal. Unless the phone is getting so hot that it's almost uncomfortable to hold, there's nothing to be alarmed about.

    My phone very rarely gets more than a little warm, even when I'm streaming a Netflix movie to it over WiFi. However, I have good signal strength in my area and I don't have a bunch of crap running in the background. The only tile I let live update is weather. I also turn the battery saver on much of the time, at least 1/2 the day. That keeps the phone from checking my friend's Facebook statuses and my 3 email accounts every 5 minutes, which I really find unnecessary when I'm at work. I usually switch the battery saver off when I'm not at work though.

    I suspect what is happening here is people have a lot of background services turned on, or possibly poorly coded apps. A weak signal area that forces the radio to keep scanning could cause this as well.

    I would take a look at what you've got running in the background. See if you have a bunch of apps/tiles that are allowed to constantly update themselves, you might consider which ones are really necessary to have updated constantly. If nothing else, you'll gain a lot of battery life by keeping those in check. It only takes a second to update a tile manually anyway. I don't need everything updating every 2 minutes, I don't stare at my phone screen waiting for tile updates all day long. I can tap a tile if I want a CNN update.
    05-22-2012 11:39 AM
  17. jaj324's Avatar
    I agree with socialcarpet, I don't need anything running in the background. If I need info I don't mind letting the app reload when I open it. LinkedIn is a good example. It was running in the background when I first downloaded it but I killed that since I only open the app maybe once a day or even every other day sometimes. Why would I want it running all day if I don't even open it once that day??

    Sent from my Lumia 900 using Board Express
    05-22-2012 11:59 AM
  18. davegarbs's Avatar
    I am having this same problem. It seems to occur right after I end a phone call and continue until I notice the phone heating up in my pocket. In this case, when I got to it, the phone was pulling 350+ milliamps from the battery, which seems outrageous.

    I only have two processes set to run in the background, Nextgen Reader and Weather Flow...
    05-22-2012 01:52 PM
  19. undisputed n00b's Avatar
    My Lumia 900 gets hot after using it on LTE for about 30min. On WiFi it takes a bit longer for it to get hot. I have noticed significantly reduced battery life but this also happened to my Focus but my Lumia 900 gets worse battery life than my focus. My Lumia 900 began to have a shorter battery life after I had it charging and was using it on WiFi, the phone began to get hot but I kept using it for about an hr more and then left it to charge overnight. There are people on XDA forums with similar problems. Lumia 900 Battery Life - xda-developers also there are people on nokia conversations with the same battery life problems but nobody from Nokia had responded to any of the threads.
    05-22-2012 02:58 PM
  20. zinrai's Avatar
    I've been having this same problem. I thought it was some background tasks at first, but definitely not. I expect the phone to get warm when I'm playing games, not uncomfortably hot when signal is weak. Also, I've seen my battery life drop 70-80% within 3 hours while signal's weak. The only way I've found to stop the battery from draining more is to turn the phone off and back on.
    Hypnopottamus likes this.
    05-22-2012 10:13 PM
  21. cluberti's Avatar
    The weaker your signal, the more transmit power the cell radio needs to keep connected to a tower. This will indeed drain your battery much faster than if you aren't struggling to keep connectivity, and it will make the phone noticeably warm. There's nothing wrong with the phone if this happens, per se, although if it happens a lot and you aren't in a low signal area (or if you aren't using WiFi or 3G/4G actively for a long time), you might have a real reason for a swap.

    It's usually how much TX the phone has to do though that causes this - if you notice you've got one bar or are bouncing between 3G/4G/Edge (or both) for any extended length of time, you can expect the battery life to suffer quite a bit, and the phone will get warm.
    05-22-2012 10:28 PM
  22. waynejk's Avatar
    With previous phones, I can vouch for higher battery drain when in low coverage areas or constantly switching between 2G/3G/4G. But in my case, I definitely had a lemon Lumia 900. I haven't experienced the purple keyboard or other general flakiness with the new phone yet. If anyone is in doubt and still within the 30 day return timeframe on AT&T, I'd highly recommend swapping it out for a replacement.
    05-24-2012 12:50 AM
  23. sdreamer's Avatar
    Happens somewhat random for me. Generally occurs when I'm trying to access data with low signal. I wonder if this can be attributed to the previous problem of memory management.
    05-24-2012 09:29 AM
  24. EddyKilowatt's Avatar
    I've been having this same problem. I thought it was some background tasks at first, but definitely not. I expect the phone to get warm when I'm playing games, not uncomfortably hot when signal is weak. Also, I've seen my battery life drop 70-80% within 3 hours while signal's weak. The only way I've found to stop the battery from draining more is to turn the phone off and back on.
    Thought I'd bring this thread back up.

    I experienced "hot phone" issues a couple of times in the first two months of ownership, but since installing the Nokia update last week (7.10.8112.7), it has happened almost every day and sometimes a couple of times per day.

    The phone works fine most of the time, typical battery discharge rate is 1-2% per hour when in standby, and 5-10% per hour when doing stuff. *Except* during a "hot phone" event... then I notice the thing getting hot in my pocket for no reason, and it discharges 25% in an hour, and the Diagnostics/Battery Status display shows 400~700 mA discharge, instead of the usual ~100mA.

    By "hot" I don't mean "smoking hot", but I do mean "much warmer than during normal active operation", and also "noticeably hot to the touch, though not painfully hot". Pretty clearly the phone should not be getting hot on its own when it is not in use.

    Doing a power cycle seems to clear the problem. I've had mixed results using the Back button to go back through all recently open apps and close them. I've got Settings/Applications/Background Tasks set to 'Off' for everything that's settable.

    I've been trying to establish repeatable conditions that provoke the problem, so far without success. Sometimes it happens after a busy use session (e.g. repeatedly switching between camera, email, OneNote, and Calendar apps), but not always... sometimes it happens in situations where cell signal may be low, but not always.

    Anyone else had problems with the phone getting warm in their pocket, or while lying on a desktop... and moreso since the recent software update?
    06-19-2012 07:14 PM
  25. matro's Avatar
    I have the same experience of EddyKilowatt with my Lumia 900 OS version 7.10.8773.98, really no more to add to his experience.

    just one: I have a couple of email accounts (hotmail and an exchange one) and during the "hot" condition, if I start email synchronization it stays on "synchronizing" on each account endlessly, without downloading anything.

    this is not due to weak signal, since as soon as I reboot the smartphone - remaining in the same place - everything is ok and downloading is excellent... until the next "hot".
    06-22-2012 03:03 AM
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