[Samsung Infuse 4G] qkster:
Remember to BACKUP your EFS before you flash!

Use This tool kit:

http://xdaforums.com/showthread.php?t=1702026

There are options to back up your EFS.

If you messed it up, here is a possible EFS fix if you did not have it backup beforehand:

http://xdaforums.com/showthread.php?t=1895500

http://xdaforums.com/showthread.php?t=1729838

http://xdaforums.com/showthread.php?t=1726149

Reconnecting your device to PC USB and driver installation problems for device recognition:

http://xdaforums.com/showpost.php?p=33980291&postcount=11

WiFi Fix:

There are several wifi fixes that has been suggested.

One of the problem involves wifi not locking on after you have flashed a ROM.

One of the fix that has been suggested involves changing your router DHCP. Setting on the router should be changed from "Never" to shorter time..1-2wks or less.

There are also downloadable wifi fix apk from the Market. Here is one example:

https://market.android.com/details?...mNvbS5icmlsbGlhcHBzLndpZmlhbmRtb3JlZml4ZXIiXQ..

You can also try a search for it.

You can also try using "root explorer", go to /system/etc/wifi and locate the wifi.conf file. Renaming this file to wifi.conf.bak and reboot. This may force the rom to generate a new file.

If it doesn't work, you can rename the *.bak file to it's original name.

I have read some others advising to flash a new modem. I have not tried this so I can't vouch for it.

I suspect that the problem comes from left over from previous settings or bad flash. The other option is to factory reset in cwm, wipe data, wipe cache, wipe dalvik and reflash.

HOW TO UNLOCK YOUR PHONE WHILE ON ICS:

here is the link:

http://xdaforums.com/showthread.php?t=2159148

Texting issue:

After UCKL2 flash, some users reported longer than 160 characters not going through.

Flashing another modem, uckd5 stock froyo or UCKI3 has been reported to fix this problem.

http://xdaforums.com/showthread.php?t=1342978

The new UCLB1 modem also fixes the 160 chars limit issue.

http://xdaforums.com/showthread.php?t=1495375

How to fix SMS:

http://xdaforums.com/showthread.php?t=1887557

Rainbow issues:

http://xdaforums.com/showthread.php?t=1483067

Media Player and Gallery borking?

http://xdaforums.com/showthread.php?t=1821170

Reminder:

IF YOU ARE GOING TO FLASH ROM remember to BACK UP YOUR EFS!

You can use root explorer. Find the EFS folder on your root. Long press it for options. Create a .tar or .zip and back it up to your PC or other place for safe keeping.

Here's a bunch of interesting codes to try:

*#*#4636#*#* - Phone Information (allows you to change the SMS service centre number and more)

*2767*3855# - HARD RESET (will fully wipe and restore firmware. USE WITH CAUTION

*#*#34971539#*#* Shows completes information about the camera

*#*#7594#*#* Changing the power button behavior-Enables direct poweroff once the code enabled

*#*#273283*255*663282*#*#* For a quick backup to all your media files

*#*#197328640#*#* Enabling test mode for service activity

*#*#232339#*#* OR *#*#526#*#* OR *#*#528#*#* Wireless Lan Tests

*#*#232338#*#* Displays Wi-Fi Mac-address

*#*#1472365#*#* For a quick GPS test

*#*#1575#*#* A Different type GPS test

*#*#0283#*#* Packet Loopback test

*#*#0*#*#* LCD display test

*#*#0673#*#* OR *#*#0289#*#* Audio test

*#*#0842#*#* Vibration and Backlight test

*#*#2663#*#* Displays touch-screen version

*#*#2664#*#* Touch-Screen test

*#*#0588#*#* Proximity sensor test

*#*#3264#*#* Ram version

*#*#232331#*#* Bluetooth test

*#*#7262626#*#* Field test

*#*#232337#*#* Displays bluetooth device address

*#*#8255#*#* For Google Talk service monitoring

*#*#4986*2650468#*#* PDA, Phone, Hardware, RF Call Date firmware info

*#*#1234#*#* PDA and Phone firmware info

*#*#1111#*#* FTA Software version

*#*#2222#*#* FTA Hardware verion

*#*#44336#*#* Displays Build time and change list number

*#06# Displays IMEI number

*#*#8351#*#* Enables voice dialing logging mode

*#*#8350#*#* Disables voice dialing logging mode

**05***# Execute from Emergency dial screen to unlock PUK code