Thread: N900- No Sim Inserted Issue, again??????
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sjgadsby is offline sjgadsby
2011-04-11 , 04:00
Posts: 5,335 | Thanked: 8,187 times | Joined on Mar 2007 @ Pennsylvania, USA
#29
Originally Posted by gomaemo View Post
Thank you for this. Well with me, a reboot would fix it about 30 percent of the times (so really non consistent). As days go by, the issue gets worse, more reboots are needed, to finally get it to recognize the SIM/ get signal.
Okay, so it sounds as though it's not a memory leak in Maemo. A reboot would cure that.

Here is whats also strange: When it starts doing it, it would just not display any bars, and once you open the keyboard, the no SIM symbol appears, close keyboard, no signal, open keyboard.....
A loose cable that runs between the display and keyboard sections of the N900, perhaps?

Once I changed batteries, the issue didnt appear until a few weeks later, during which I was convinced the battery is causing it. Now the SIM seems to do it.
This might support Texrat's memory leak theory. Rebooting (or shutting down and restarting) an N900 completely restarts Maemo, thereby correcting the damaged caused by any memory leaks there. However, I don't know whether or not a reboot also causes the GSM processor to restart.

It could be that the GSM processor maintains its state through a phone reboot. Pulling the battery, either to replace the battery itself or the SIM card, would force the GSM processor to start anew though.

Does pulling the battery get your phone working again (at least temporarily) every time? There's a small backup battery or capacitor inside N900s to help them retain settings (such as date and time) through battery changes, so you may need to keep the battery out of your N900 long enough for that to drain. A minute or two should be more than enough.
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