iPhone Downgrading IOS 7.0.6

[robert d]

Hi all this is my first post on this forum. I got an iphone 4 second hand and it had ios 7 installed. I don't dislike ios 7.0.6 but I can't unlock even if I jailbreak it and install ultrasnow or SAM. I think the baseband is to high, but I could be wrong.
I do travel for my job and I need an iphone that I can travel with and change the sim card as needed. I am almost certain that I can't downgrade the phone back to ios 6.1.3 because I don't have the SHSH blobs. Are the only routes availible to me.. 1. Jailbrake and get a Gevey sim card? 2. Contact the provider that the phone was locked to and see if they can unlock it for me? I would prefer a software unlock that I can do myself.
Any help or insight would be greatly appreciated. Thanks in advance.

 

[bkends35]

Unfortunately you're stuck on 7.0.6.

 

[Armen]

Try posting this in the Jailbreak forum

https://forums.macrumors.com/forums/105/

 

[robert d]

Try posting this in the Jailbreak forum

https://forums.macrumors.com/forums/105/

Thanks Armen I appreciate your advice. I started a new tread on the link you sent me. I hope that works. Thanks again.

 

[dhlizard]

Even if you could downgrade the firmware on your iPhone 4, you cannot change the baseband.

Thus - no software unlock is possible.

Get the selling carrier to unlock it or pay for an aftermarket IMEI unlock (might be expensive)

You should have done this research BEFORE buying a phone you cannot software unlock.