[HTC Sensation] WellTrainedVC:
So... Before I begin, I want to say thank you above and beyond the many thanks I give to all of those that have left threads and/or processes (automated or otherwise) for the remainder of the 95% of XDA members to utilize. Thank You All!

I also would like to apologize in advance for losing my mind and posting something which I could have went about reading and reading about for several days still. Please understand that I have done so very much to get this device (HTC Sensation 4G) to even function as it is now. I received a device that was stuck in a boot loop, overheating, and eventually I lost the ability to see the screen! I have fixed, by luck and some by good theorizing, this beautifully designed device (as most of HTC's higher-end devices are designed).

Because I am absolutely tired, and my eyes have literally glazed over from ALL of the reading I have done over the past 2 weeks, I will cut right to the chase:

Where I am now after getting the device stabilized -

1. The device will not connect to any mobile network, but it will recognize only AT&T (this is a T-Mobile device using an updated, new, SIM card).

2. The one item I believe directly correlates to this issues is the contained in the photo beneath:

My question(s) are as follows:

1. Am I correct in thinking that the picture of the Security Warning screen taken in the HBOOT is indicative of a possible attempt to change the device (and I know I did not say this part, but I believe whomever owned this prior to the gentleman I purchased it from tried to SIMunlock the device)?

2. I am unable to get my Win7 (32bit) computer to recognize any of my phones now. Is there something readily apparent (and without any further info) that I may be missing? I uninstalled all the various version, and there were plenty, of HTC Sync, Sync Manager and Driver Installers! Then I thoroughly cleaned my PC, restarted it, and then reinstalled the driver software. I am at a total loss and probably need to sleep sometime!!!

3. Has anybody else ever dealt with this issue? If so, please feel free to call me a mean name, but in a sensitive manner as I suffer from Major Depressive Disorder (and mostly because I am sensitive)!

4. NOT A QUESTION. I just want to say for the record that I did not ever take the easy way out and immediately seek assistance from another; instead I made the decision to read and read and read and read and read and read, and then hypothesize, and figure out a plan to attack the issue, then execute that plan in an organized and well thought-out manner. This is mostly due to my breaking my first LCD ever! After that I really though long and hard about how I had become somewhat cocky and thought I could just whip through anything! WRONG!!!! Take your time, ALWAYS, read, re-read, then read again instructions. Find the video and watch it several times, and even write notes. This is no different a learning process than anything learned in school.

Thank you all for your positive input and feedback, and hopefully answers. :)

So..... *INHALE* Excuse me if this is long-winded (esp. since I have tons of time on my hands, and I am not really quite right)..

*****UPDATE ON PREVIOUS WARNING ISSUE******* (See image below)

1. I just noticed when reviewing the damned photo that the **Radio is missing! Hmmmm...

2. (3rd overall photo re: RUU) My serial no. is totally screwed as it reads: 123456789012

- ANY ideas on how to fix this would be awesome! Please also note that my MAC Address as well is all messed-up: 00:ff:dd:ee:gg:11 - not exact just an example of how screwy it reads. Therefore I believe a HUGE problem with the RUU functioning correctly!

3. Numbers 1&2 are probably the reasons I cannot connect to the T-Mobile US network!

New question(s): How do I get my serial number back on my device? Will this process fix my MAC Address? I have thoroughly looked at the chips on this device, and I have never spotted the MAC Address stamped anywhere on the board.

Thank you to the member that assisted me before. Definitely a good starting point/way to jump start my head again. As was the actually sleeping for more than 3-4 hours!