[Sony Tablet S] fortissimo:
I am not and was not questioning your knowledge. If you are admitting that you received wrong information from another source, at least point out that source so we can also correct things over there too, instead of leaving the incorrect information around which would be a potential for more misleading incidents. However, you seem not wanting to share that part, barely touching on "your research". Sure, this is a free world and I cannot force you to do something you don't want to do. But obviously, it is your reputation on the forum board here, not mine.

I already partially explained why I didn't go full monty in the past posts, if you ever read my posts (but I am sorry since I tend to be long winded). The more complete points are (which I am surprised I really need to explain myself in full here, and yet you would not reveal your source which misled you and in turn , the rest of the readership here):

1. There are several F5521gw models on the market, such as eBay. Some are cheaper, but only branded as Dell and HP, some are branded generic, but more expensive. One branded generic and cheaper, turned out the marking, I can compare it to the Dell model, thus I have doubts that they are truly generic model. This is a big deal for laptops, but it is virtually an unknown case for Tablet P, if this matters or not. We are talking about $40. to $60. or even more here.

2. I am a cheap person so I don't throw my money around if I don't know if it is going to work, especially if it is not 100% necessary, and if there is a chance I can find out the facts before I take the risk. Would forum members be able to contribute a fund for me to do the testing, then it would be a different matter (not that I am asking for this now, but sure it is definitely an option). If you are so keen, sure send me some money for my effort and put the money where the mouth is. My money doesn't grow on trees unfortunately.

3. Again about economics, unfortunately, none of my laptops have a m-PCIe socket and pre-wired HSPA antennas, so I cannot have a 2nd use (even again, I don't have a need for). A friend in another country does have one, but he already bought Gobi modem cards for them, and only cost him $10. each piece, so there is no way I can find a 2nd use for it, or even recoup the cost. (If I sell it back on eBay I am sure to loose money not to mention time and effort).

The eBay seller which put up auction for codes obtained from Sony for $61.99, has closed the auction and I no longer see it. If the generic modem is the only possibility, and cost the upward of $60. or so, I might as well buy the code and be safer instead (assuming the auction for the code is not a fraud, which I doubt as it is too specific to models). But because of a few reasons, including no confirmation from your earlier post, I hesitated and even missed this chance myself.

So I am saying that I am not trying to make this a big deal, but to my timing and need, it is a big deal. If no more codes can be bought, then replacing the modem is the only way, and it is now an unknown, as nobody has posted that they had a success report.

If money is not a problem for you, you can buy the modem on eBay, ship your modem and your Tablet P to me, and with return postage paid to me in advanced, I will swap out the modem for you, no charge (but you pay both way shipping and I live in Canada), and ship it back to you. Then if it works, then good, we will both know. If it doesn't work, then it's your money, not mine. I will help you in order to help everyone to solve this mystery. I won't use my own money to take the risk, even though $60. to some people, is nothing.

It amazes me that with 3 replies you continue to sidestep what you have a responsibility to explain. And also I am also surprised as a long term member here, you don't seem to have the right attitude align with most xda members, when you were so afraid of taking risk in opening up the unit and questioning who would do it and for how much etc. Sure this is not the xda way and you should know better. xda is for experimentation and more so than any other sites.