N97 no network signal after reboot (useless)

This is the second N97 I've got. First one I have returned since I thought there was a failure on the machine.
On the second one I've got the same issue. I need an EXPERT help.
1. Previously I've got an N95 8Gb. I did my back up using OVI.
2. I connected my new N97, after I've configured the phone (e-mail account with pop3 and smtp settings; personal preferences; network connections; SIP settings, etc). Then I passed the content of my N95 to the N97.
3. I also transfer some pictures and songs, but doing a copy and paste (The N97 it is listed twice on my PC as two storage devices, both named N97; when I click on anyone there is shown - on both - the phone memory and the memory card)
4. I've installed some applications using OVI, except Fring, that I downloaded searching the application through the Nokia website.
5. Everything runs pefect and smooth, including Fring application (I use only Skype, SIP and LAST FM through Fring). All the settings are the same I am currently having on my N95 (I still having it and using it).
6. Once I turned off my phone and restart, my screen it is "empty", with no content. On the bottom menu where it is by default "Options - the keypad icon - Contacts" only it is shown "Options - the keypad icon". The "Contacts" option has dissapeared and the "keypad icon" it is useless (I cannot operate it).
7. Also on the upper left section of the phone, where there is the 3.5G signal and some other data (I think the carrier name, in my case it is AT&T) it is only shown the antenna, with no any bar signal over it (like when you don't have signal at all). Please, notice this is not an X sign that usually it is when the phone is on "Offline Mode"
8. I checked the Network, under Connectivity menu (I can enter on the menu pressing the front key on the lower left section of the phone). It shows "Network unavailable". I've got inside the Network menu. Operatior selection now is under "Manual" (it was under Automatic before). When I am entering to the Operator Selection a message says that I cannot change the operator since I am in "Offline Mode". I press the power button once, to change to Normal Mode. Nothing has changed.
9. I have RESET the phone (*#7370). Phone starts again as a new phone, but the memory card has the same content (the memory card it is not formatted, even when I do the RESET).
10. I've tried to configure the phone with my e-mail account settings but not adding any application (I thought that maybe the Fring was giving some problem, specially since it is configured by default to start the application when the phone startup. That's the way it is configurated on my N95 with no problem. Even not installing the FRING application the problem is still there: I turned off the phone, then I powered on and the screen was the same as I have described.
11. I though that the problem could be some file copied from the N95, when I did the copier content, or when I just did the phone switch or when I did the copy and paste of my pictures (jpg) and mp3 files.
12. The weird is that this is happening to me AGAIN on another phone. As I said, the previous one I have exchanged for this one since I thougt something wrong was with my phone. Obviously or there is something wrong with all N97 or there is another reason. But I need HELP!!!!!!
By the way, after this problem occured, when I left my pohne on for a while and it gets locks I cannot unlock it unless I remove battery and connect the usb cable.

Ok.
I have tried that before already. It is the same as *#7370#. Just in case you ask, I tried both methods, the key sequence and the code imput, and just want to say that I will not loose all my data if I do it. For example my pictures and songs are still there.
Actually I did this reset already..... 7 times? (more or less)
I did it on the FIRST n97 and also in the SECOND n97 machines (if you don't understand what I mean you will se my first post here where I describe all my nightmares)
BOTH has the same response. After a while, I turn it off/on and it is converted in a nice useless ornament.
Also, connecting my device to my PC trhough USB cable, if I do a search I can find some files related with previously installed applications like FRING (previously to the "hard reset" that I doubt it is a real hard reset, since it is not leaving the phone as the first time; does not format the whole memory on it).
BOTTOM LINE: this is not HELPING
By the way: yesterday I was surfing this place and I found another post named: "Re: how to fuly hard reset/format n97?", where for an instance you, radical24, has participated on it, too.
There is a post from bbianchi. He has uploaded some pictures that are actually showing what my phone does (looks like there are MANY doing the same outthere!!!). Specially the FIRST picture, where it shows the antenna with no signal (not Network available, even with my AT&T SIM card inside)
bbianchi wrote:
This is all I get when I turn it on:
http://gallery.me.com/n6oob#100041/IMG_0942&bgcolor=black
Did this user find a solution? Is he or she using his n97, running applications, having solved his problem?

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