[AT&T Samsung Galaxy S 5] cciechad:
Yeah I would buy that if HTC didn't have HTCdev.com. There is no way Samsung ended up with a more restrictive contract than HTC.

I was bored so I decided to bug the Samsung tech support folks. Transcript follows

info: Please wait for a Samsung Agent to respond.

info: You are now chatting with '****'. There will be a brief survey at the end of our chat to share feedback on my performance today.

info: Your Issue ID for this chat is ******

Alice: Hi, thank you for contacting Samsung Technical Support. How may I help you today?

Chad: I'm looking for a way to get a signing key for my S4 (SM-G900A). Like HTC provides at htcdev.com.

Chad: sorry its a S5

Alice: I understand that you want to have signing key for S5. Am I correct?

Chad: Yeah basically I want to unlock the bootloader.

Alice: Thank you for information.

Chad: Or I'd be willing to return this S5 and buy direct from Samsung but i couldn't find one on the website with the same US ATT bands just the verizon ones.

Alice: I would like to inform you that there is no such option in S5 device which you are using.

Chad: Samsung must have the key for my S/n

Chad: it was burned in when they manufactured the handset

Alice: You need to buy Developer Edition model to unlock the bootloader.

Chad: i would like to do that but i dont see an att developer model

Chad: and last i checked the verizon one wasn't orderable

Chad: I'm a long time Samsung customer I must have at least 12 samsung devices in my household.

Chad: This lack of help is going to drive me to HTC for mobile.

Alice: I do understand your situation.

Alice: I apologize for the inconvenience caused.

Chad: and I may have to look at other TV electronics manufacturers

Chad: Samsung does have the key and are refusing to provide it?

Chad: Its win/win for you. You get out of warranty obligations.

Alice: I would have surely helped you if there is an option. Please understand that Samsung manufactures the devices based on the carrier specifications.

Chad: I understand that but you have the key. HTC does the same thing and they provide the key at htcdev.com

Alice: The warranty will be voided if you try to unlock the bootloader.

Chad: I understand that and I'm ok with it. Samsung wins no warranty obligations.

Alice: I do understand your concern. I am sorry to say that there is no option to unlock the bootloader .

Chad: You mean samsung won't give me the info i need.

Chad: OK I will return the phone. I have huge amount of Samsung gear in my house. It will no longer be my default manufacturer for electronics. I have been a customer for over a decade.

Chad: I'd like a corporate contact to send a letter or email to as well please.

Alice: I apologize for the inconvenience caused.

Chad: I'd also recommend you put a warning sticker on the boxes with phones with the locked bootldr. Its kind of sleazy to not warn people about that.

Alice: I would have surely helped you if there is any option for me to help you. Samsung will not recommend to unlock the bootaloader.

Chad: I understand that and I would buy it was a contract restriction with ATT if HTC didn't provide exactly what I'm asking for with the M8.

Alice: I apologize for the inconvenience caused.

Chad: Not your fault I know you don't set the policy. Do you have someone in public relations or somthing like that I could send an email to?

Chad: I just want to vent my frustration to a VP level person. I've been buying a lot of Samsung product for years.

Alice: I will provide you a link where you can send an Email to Samsung.

Chad: thank you

Alice: http://www.samsung.com/us/support/email/product/SGH-I317TSAATT

Alice: You're welcome. Is there anything else I can assist you with?

Chad: No that was it I'm happy with all of my other Samsung products at this point.

Chad: thank you

Alice: I really appreciate your time and patience.

Alice: We thank you for your inquiry today and hope your experience with Samsung tech support has been a pleasant one. In an effort to continuously improve our service, we request you to take a minute and complete a quick survey.Please click blue 'X' button on the upper right corner and you will be provided with the survey to complete.

info: Chat session has been terminated by the Samsung Agent.