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---
title: Tips & Tricks for the iPhone
layout: default
created: 2009-05-05 00:54:50 +0200
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updated: 2010-04-20 23:57:18 +0200
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toc: false
tags:
- know-how
- hardware
- apple
- iphone
- tipsntricks
---
Mark mail as unread
===================
There's a somewhat hidden way to mark messages as "unread" in the mail app: When viewing a mail,
touch the **Details** link in the upper right. Then find the **Mark as unread** link below the subject.
Access Network Monitor
======================
If you like to see the reception status of all the cells you're receiving, type the following code on
the dialpad and press the dial button: ** `*3001#12345#*` **
Recover from Recovery Mode loop
===============================
If you try to update the firmware, you might be stuck in the *"Connect to iTunes"* -recovery mode although you didn't
change any bit of the firmware (e.g. because of some freakin' errors of iTunes). You now have the choice between a
long firmware+backup restore - or get your iPhone back running in about 30 seconds. The procedure is described
at [ihackintosh.com ](http://www.ihackintosh.com/2009/09/recover-iphone-3gs-from-apple-logo-or-recovery-mode-loop/ ). Do
yourself a favor and **don't try it in Windows** . Installing `libusb` there broke something and after a reboot of
Windows, all USB devices didn't work and hat yellow exclamation marks in the Windows device manager. Under Linux,
it's easy as pie. These instructions are for Ubuntu:
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1. get [iRecovery ](http://github.com/westbaer/irecovery ) source code and install [build-essential ](apt://build-essential ) as well as [libusb-dev ](apt://libusb-dev )
1. compile *iRecovery*
1. get the iPhone into recovery mode:
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* switch it completely off, disconnect all cables
* hold down the ▢ Home button
* keep the button down while connecting it to the PC
* wait until the *"Connect to iTunes"* logo appears, then release the ▢ Home button
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1. now run: `./irecovery -s`
1. wait for the prompt (`]`) and enter the following commands: (if `fsboot` doesn't do anything, type `reboot` )
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{% highlight text %}
] setenv auto-boot true
] saveenv
] fsboot
{% endhighlight %}
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1. your iPhone should now boot normally
