iPhone 3GS: random reboots

[juju4]

Hello,

I recently recovered a used iPhone 3GS, had it officially unlocked, fully restored, updated to 6.1.3/latest available on it.
And since, I have several freeze with or not reboot. Application goes shadowed or black, eventually go on reboot on itself, either I asked it (power long), usually multiples reboot 2 to 5 times in a row and after seems to go off/battery drained mode. I need to plug it on power to get it back, usually at least one hour and after start again.
Not sure if it is a real reboot as the multi-tasking bar seems to keep opened applications
It happens anytime on springboard, apple applications, others

The only way it seems to keep it stable is keeping it connected to power (very useful for a mobile phone).

I tried the following by jailbreaking
- disabling multitasking w Ztoggle: seems to be not working/still have multitasking bar
http://forum.macbidouille.com/index.php?showtopic=365054
https://discussions.apple.com/thread/2471090?start=2220&tstart=0
- switching mobilewatch
http://www.sopertek.co.uk/3gs/
- No reduce motion, only ios7: http://support.apple.com/kb/HT5595
- No background app refresh, ios7 only too
- turn off location service
=> didn't help

Don't want to pay for a battery change on a so old iphone but if I could avoid buying a new smartphone.

I checked most notably the following threads on the forum.
https://forums.macrumors.com/threads/1643168/
https://forums.macrumors.com/threads/1643050/
https://forums.macrumors.com/threads/1656521/

Some crash log read from Xcode

Hardware Model:      iPhone2,1
Process:         locationd [54]
Path:            /usr/libexec/locationd
Identifier:      locationd
Version:         ??? (???)
Code Type:       ARM (Native)
Parent Process:  launchd [1]

Date/Time:       2014-01-21 14:26:00.031 -0500
OS Version:      iOS 6.1.3 (10B329)
Report Version:  104

Exception Type:  EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000001, 0x000000000000defe
Crashed Thread:  16
<<<
Hardware Model:      iPhone2,1
Date/Time:       2014-01-15 21:35:42.602 +0100
OS Version:      iOS 6.1.3 (10B329)

vbat=4025,t=3006,v=4022,ac=355,f=262,rc=0,fcc=159,dc=1200,s=16395,fv=279,rd=17,ci=296,mic=0009000000000000000000000000000000000000000000000000000000000000,82=030a018d0601eeff2bfc4b000802bc811c0ffa00000000000000000000000000,88=005500e600e600e800fd00bb00a900c800ec00e000d60100012d01ec03cd04c1,89=000000e600e600e800fd00bb00a900c800ec00e000d60100012d01ec03cd04c1,82'=030a018d0601eeff2bfc4b000802bc811c0ffa00000000000000000000000000,88'=005500e600e600e800fd00bb00a900c800ec00e000d60100012d01ec03cd04c1,89'=000000e600e600e800fd00bb00a900c800ec00e000d60100012d01ec03cd04c1,ac'=0,t*=3006,v*=3910,ac*=0,f*=256,rc*=438,fcc*=688,dc*=
<<<
Hardware Model:      iPhone2,1
Process:         MobileCal [570]
Path:            /Applications/MobileCal.app/MobileCal
Identifier:      MobileCal
Version:         ??? (???)
Code Type:       ARM (Native)
Parent Process:  launchd [1]

Date/Time:       2014-01-29 11:27:46.976 -0500
OS Version:      iOS 6.1.3 (10B329)
Report Version:  104

Exception Type:  EXC_CRASH (SIGABRT)

Any ideas?

Thanks a lot

Julien

 

[E2EK1EL]

Have you tried running it stock for a while? It is a 5 yr old phone, replacing the batt may not be the problem and it could even be a faulty transistor and capacitor on the logic board.

 

[Carlanga]

restore as NEW don't use backups

if it is still giving you trouble, take it to apple (not a third party) to get the battery replaced (I think is like $69), but you get a refurb instead of a new battery AFAIK for the 3GS That way you can be assured you don't spend on a battery when it might be something else.