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  • Fix Battery Drain with redsn0w 0.9.6b6 and SAM


    The iPhone Dev-Team has released redsn0w 0.9.6b6 for Windows and Mac with a new tweak that avoids the issues like battery-drain and overheating that plague unlocks. Rather than using redsn0w to hacktivate, this version lets users click a "Deactivate" button to remove the patches that affected battery life and push notifications, allowing @sbinger's SAM tool to do the hacktivation.

    Sam (@sbinger) Binger, the developer of TetherMe, came up with what he calls Subscriber Artificial Module (SAM), which tricks iTunes and your iPhone into generating official activation tickets even though the unlocked device carries an unofficial SIM. As a result, the lockdownd patches that were required to make hacktivation work with redsn0w are no longer needed, and unlockers can use SAM to hacktivate without taking the battery life hit.

    The Dev-Team is making the process easier by adding a "Deactivate" button, which removes the patches and lets SAM take over the hacktivation process. SAM also includes a "stockify" tool to let users of iOS 3.0+ to revert to a stock lockdownd: add http://repo.bingner.com as a repo in Cydia, install "SAM" and "SAMPrefs," and then run stockify in secure shell.

    Source: Dev-Team Blog
    This article was originally published in forum thread: Fix Battery Drain with redsn0w 0.9.6b6 and SAM started by Paul Daniel Ash View original post
    Comments 120 Comments
    1. phee's Avatar
      phee -
      i first tried all the steps provided with a T-mobile sim and now every time i respring or reboot i get the waiting for activation notice! so now i've got a 'dead' ATT sim to try and "activate" through itunes but nothing happens =T any ideas?
    1. jerri blank's Avatar
      jerri blank -
      Quote Originally Posted by MrKuenning View Post
      FIXED!!!

      I had disabled it with red snow and still got a battery drain when notifications were turned on.

      I updated SAM and SAMPREF to the newest version that came out today, and presses the revert to stock lockdown button. It said success. Then I pressed clear push sessions, and then de-activate phone and then I synced with iTuenes.

      Now I have notifications turned on, and I have no battery drain.

      UPDATE: Strike that, I am now getting a drain, again, just a slower one.
      I can still see that its sending and receiving 2kb every second.
      Thanks for this post - I didn't know SAM had been updated. Very cool of Bingner to put out a build that does with a touch of a button what you previously had to do via SSH (which I still haven't learned how to use) - the "revert LockdownD to Stock" function.

      I used the previous version of SAM over the weekend and thought I had solved my battery drain problems, but it appeared to come back during the week for some reason. So I followed MrKuenning's instructions above, and things appear to be better now. Let's see how long it holds.
    1. jerri blank's Avatar
      jerri blank -
      Quote Originally Posted by MrKuenning View Post
      UPDATE: Strike that, I am now getting a drain, again, just a slower one.
      I can still see that its sending and receiving 2kb every second.
      How are you able to tell that it's sending and receiving 2kb every second? I think mine is also doing something similar because I hear interference in my PC speakers.

      The battery situation on this thing is very erratic. Today I left the phone alone with no apps running, no wi-fi and no bluetooth, and it drained to nothing within about 5 hours. Other days it will go and go and barely make a dent in the battery. I don't get it.

      EDIT: So I went into SAM, cleared push sessions, reverted lockdownd to stock, deactivated the phone and then reactivated. All the racket my speakers were making has stopped. Is it possible the Ultrasn0w lockdownd's overwrite the stock ones periodically, making it necessary to go through the SAM process again?
    1. hellodrsoul's Avatar
      hellodrsoul -
      I am not sure about how a factory unlocked iPhone and iTunes behave when iPhone has to be activated in iTunes. After plugging in and out for multiple times, i finally got my 3Gs activated. iPhone flashed a brief activation screen while iTunes was quite silent. SAM shows wildcard activated. But battery problem is same as before after redsnow jailbreak without SAM installtion.
    1. jerri blank's Avatar
      jerri blank -
      ERASED - I'm full of crap.
    1. MrKuenning's Avatar
      MrKuenning -
      Quote Originally Posted by jerri blank View Post
      How are you able to tell that it's sending and receiving 2kb every second?
      I go into usage and press clear, then go in and out every second and watch it go up a few KB every second. Then I disabled notifications and it doesn't go up at all.
    1. Jeffwo's Avatar
      Jeffwo -
      OK....I have read this entire thread and I'm still not convinced this process fixes the battery drain problem.

      Has anyone sucessfully fixed the problem and still be unlocked? I have 3G/4.2/Redsnow/Ultrasnow unlocked.

      What are the best/clearest/latest instructions?

      Thanks,
      Jeff
    1. MrKuenning's Avatar
      MrKuenning -
      I have 3g/4.2.1/Redsnow/Ultrasnow/SAM and I when I disable notifications I get NO battery drain. Infact I think I get longer battery then I did on 4.0
    1. jerri blank's Avatar
      jerri blank -
      Quote Originally Posted by MrKuenning View Post
      I have 3g/4.2.1/Redsnow/Ultrasnow/SAM and I when I disable notifications I get NO battery drain. Infact I think I get longer battery then I did on 4.0
      Are notifications the same as/related to "push sessions" in SAM? Because when I clear push sessions in SAM, my battery life improves 1000 percent.
    1. MrKuenning's Avatar
      MrKuenning -
      Well the button in sam also seems to "kill" notifications.

      But I go into settings /notification, then slide it to off.
      This kills push notifications for apps. It doesn't kill sms or email notifications.

      Turning this off stops your phone from trying to talk to apple every second and authenticating your phone, thus draining your battery.
    1. Jeffwo's Avatar
      Jeffwo -
      Quote Originally Posted by MrKuenning View Post
      I have 3g/4.2.1/Redsnow/Ultrasnow/SAM and I when I disable notifications I get NO battery drain. Infact I think I get longer battery then I did on 4.0

      Couldn't you just turn off notifications without going thru the SAM method and do the same thing?
    1. MrKuenning's Avatar
      MrKuenning -
      My understanding is that sam is supposed to allow the phone to activate the "normal" way and then you don't get the battery drain caused by the phone trying the authenticate every second.

      Mine apparently doesn't do this so I just turned off notifications.
    1. chato114's Avatar
      chato114 -
      I have a 3G 4.2.1 bb 6.15.00, I was one of the douches that updated, however every-time I use the SAM process to enable push notification it doesn't work. I've literally tried this for about a day now and still no push notifications. Can someone please help me.

      I first restore to custom 4.2.1, then jailbreak with redsn0w(latest one), go to cydia and download both SAM and SAMprefs, respring, jailbreak again to deactivate, unplug iphone from computer before reboots, then go into settings to SAM pressing deactivate also selecting carrier bundle ATT-US and SIM ID (Using T-mo sim), open Itunes and connect iphone it activates but when I download an app like loopt it still gives me the thing about Notifications disabled connect to itunes to enable push
    1. jerri blank's Avatar
      jerri blank -
      Can't you just go into settings to enable notifications?
    1. chato114's Avatar
      chato114 -
      I tried and still nothing, is there another way to have push enabled?
    1. BringTheLight's Avatar
      BringTheLight -
      Quote Originally Posted by chato114 View Post
      I tried and still nothing, is there another way to have push enabled?
      Same problem here... No solutions?
    1. lauris47's Avatar
      lauris47 -
      I stil lhave battery drain problems...
      I wil lsell my ihone in about 10 minutes, and i will get in trouble if i wont solve this..

      so I didnt sold my phone because of that. lost 100$
    1. lauris47's Avatar
      lauris47 -
      You wana hear that I dissing developers or something ?
      NO!
      Just battery drain issue didn;t let me earn som coins.
      I'm in Denmark now. i bough iphone from us for ~200$ and was about to sell it for $293.
      And while trying to fix battery isue I bricked iphone in front of buyer. Epic fail.
      And i worked about 9 hours today, trying to fix this. but still no luck.
      So what i did was. installed 4.2.1 ; unlocked with redsn0w; instaled ultrasn0w via cydia; then sam via cydia. then deactivated it through redsn0w. I think i need to do something in sam right ? updates makes it more complex so i don't understand it anymore.
    1. lauris47's Avatar
      lauris47 -
      I'm still using 3G, I have two of them now.
      I solved this overnight, just redone all steps that I mentioned but didn't touched sam at all just installed it. But someone could still tell me what steps I have to do after installing sam. Few times I had problem when battery discharges like in 5 minutes from 100% to 17% then phone turns off itself.When I turn it on with the sim in it will turn off it self always.
      that was strange but I don't care about it since it happens not often.
      Thanks for reply !
    1. Zoex117's Avatar
      Zoex117 -
      When I install sam and go through the process and try to activate with iTunes it says Sim card not recognized. I picked custom carrier it even says wildcard activated ..so when I run Redsnow, deactivate , also in SAM .. iTunes still won't activate my sim .. What am I not doing right