Font render issue after upgrading to iOS 4.2.1.

Hi,
I happen to have a friends iPhone, trying to restore it with original firmware 4.2.1, but it keeps a font issue where it has trouble getting it right.
http://www.stepserver.nl/~step/3gs1.PNG
http://www.stepserver.nl/~step/3gs2.PNG
I tried to recover the iPhone in any way, tried different languages. Inverted the screencolors all to no avail. Does anyone have any idea what I can do to correct this issue? Or is this an overheating problem (GPU related), however the icons and background and rest of the iPhone is alright (except all the fonts..)

I have the same issue after iOS 4.2.1 update. I am using iPhone 3GS officially unlocked by Apple. I tried using different SIM cards and both carriers show same problem when using phone in 3G mode. Phone falls back to EDGE mode showing 'E' from '3G' at start. I have reset the phone and rebooted several times and moved to different cell areas in the city just to verify the problem.
I had no such issues earlier. I also have Nokia E71 which shows full signal and has no such issues.
I have posted the bug on apple iphone feedback page. I hope they Apple will fix the problem and test the release properly on all models before releasing to public.

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No way to come back to iOS 7 ...
But did you tried to reset all settings (general -> reset -> all settings) ?
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Try a Restart.
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Resetting your settings
You can also try resetting all settings. Settings>General>Reset>Reset All Settings. You will have to enter all of your device settings again.... All of the settings in the settings app will have to be re-entered. You won't lose any data, but it takes time to enter all of the settings again.
Resetting your device
Press and hold the Sleep/Wake button and the Home button together for at least ten seconds, until the Apple logo appears. Apple recommends this only if you are unable to restart it.
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------------------ show diag ------------------
Slot 0:
VSA IPsec Card Port adapter
Port adapter is deactivated
Port adapter insertion time unknown
EEPROM contents at hardware discovery:
PCB Serial Number        : JAF1309ADDT
Hardware Revision        : 1.0
Part Number              : 73-10220-05
Board Revision           : B1
RMA Test History         : 00
RMA Number               : 0-0-0-0
RMA History              : 00
Deviation Number         : 0
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CLEI Code                : CNUCAFNAAA
EEPROM format version 4
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0x10: 05 0D 41 01 00 82 49 27 EC 05 42 42 31 03 00 81
0x20: 00 00 00 00 04 00 88 00 00 00 00 CB 94 43 37 32
0x30: 30 30 2D 56 53 41 20 20 20 20 20 20 20 20 20 20
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0x70: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
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Regards,
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Hi igor,
1) FDP image
Field-programmable devices (FPDs) are hardware devices implemented on router cards that support separate software upgrades. An FPD image package is used to upgrade FPD images
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The FPD automatic upgrade feature searches only for the FPD image package file that is the same version number as the Cisco IOS release being used by the system. For example, if the Cisco IOS release being used is Cisco IOS Release 12.4(5)T1, the system searches for the FPD image package file that supports the specific Cisco IOS release (c7200-fpd-pkg.124-5.T1.pkg).
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From the document below which I already sent you, please refer to the section “How to Upgrade Field-Programmable Devices”
http://www.cisco.com/en/US/docs/routers/7200/configuration/feature_guides/fpd.html
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Ok, thanks everyone's experience sharing with each other. after I try so many time with my bro for this issue, finally we got solution to solve this issue.
I'm using iPhone 4 and my bro is using iPod touch 4th Generation, we both upgrade to iOS 5,
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<Edited by Host>

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Hi,
I am experiencing crazy sluggishness in my GSM iPhone 4 (2011 model) after recently upgradig to iOS 7.0.2 from 6.1.3. Phone's freezing every few seconds and when it does, you can't do any activitiy, keyboard will not respond, videos will freeze etc.
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rajivrp wrote:
Hi,
..Phone's freezing every few seconds .
Any thought is greatly appreciated.
Try This...
Close All Open Apps... Sign Out of your Account... Perform a Reset... Try again...
Reset ( No Data will be Lost )
Press and hold the Sleep/Wake button and the Home button at the same time for at least ten seconds, until the Apple logo appears. Release the Buttons.
http://support.apple.com/kb/ht1430
Also try a Reset all settings
Settings > General > Reset > Reset all Settings.
This will return all iDevice settings to factory defaults... you will not lose any data.... But you will have to re-enter all of the device settings.
If no joy...
1) Connect to iTunes on the computer you usually Sync with and Restore
http://support.apple.com/kb/HT1414
Make sure you have the Latest Version of iTunes (v11) Installed on your computer
iTunes free download from www.itunes.com/download
rajivrp wrote:
- Is there any way I can go back to previous version ...
Apple does Not Support Downgrading... Never has.

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Message was edited by: Apelsincheg

Using the battery level meter in this manner is comparable to using your car's fuel gauge to calculate miles per gallon. The only thing that matters is the total amount of operating time from full charge to auto-shutdown.
Use the wall-mount charger that came with the iPad and charge overnight. Admittedly the labeling is hard to read but, if you use a magnifier and squint your eyes, you'll see "Output 5.1V, 2.1A." The symbol between volts and amps is the symbol for DC. Do NOT use an iPhone charger. Do NOT use an iPod charger. Then, operate it normally until auto shut-down (ignore any low level alerts that may appear). An irony is that doing that test to determine the total operating time is also the exact procedure necessary to calibrate the battery level meter..
I'm not claiming that you do not have a problem. I am stating, however, that we don't yet know whether or not a battery problem exists.
According to Apple:
Use Your iPad Regularly
For proper reporting of the battery’s state of charge, be sure to go through at least one charge cycle per month (charging the battery to 100% and then completely running it down).
Elsewhere, Apple elaborates and explains that two half-discharges (or four quarter-discharges, etc.) equals one full discharge.
I'm not saying that you don't have a problem. However, I am saying that we don't know.

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Hello JParetta,
Thanks for using Apple Support Communities.
I'd like you to please follow the directions in the article below to start troubleshooting this issue where you're losing Wi-Fi connectivity.
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Take care,
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Font render issue after upgrading to iOS 4.2.1.

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