Unable to connect to WiFi AP with hidden SSIDs - HTC One X

Hi,
I'm having problems connecting to WiFi APs that have hidden APs. I've tried manually adding the network but it keeps showing them as out of range. Once I unhide the SSIDs, I'm able to connect successfully, but after hiding again, it shows them as out of range. I've tried 2 APs (TP-LINK and ASUS) and both have the same problem.
Device is a stock HTC One X on Android 4.2.2 (latest I think) and is freshly factory reset.
Any ideas?
Thanks.

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I've searched several threads, but can't figure out what I'm doing wrong.
Both devices definitely 100% rooted with superuser working fine, permissions granted for all apps.
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If I attempt to run it with these settings, I get a popup informing me the wifi hotspot started, but with errors. The log just says most of the wifi steps failed, I can post details if needed. I don't think it's really running - no upload/download indicator showing at the bottom of the app. My PC can't see the hotspot.
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So, I got ZT-180 Adhoc Switcher.apk for the kindle fire, to switch it to ad-hoc mode. Went to settings, told it to connect to AndroidTether. Switched to Ad-Hoc mode. It says "attempting to connect" ... after a minute it gives up and keeps retrying. The hotspot shows in the list of wifi networks, but it's hanging at "Obtaining IP address".
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http://foxfi.com/bin/
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[Q] I9195 - Unable to connect to WIFI network (Authentication error occurred);

So, here it goes.
My goal is to connect to a network using certain MAC address. Wanted network is marked with "open" and I know that it allows access only to certain devices (according to MAC) on which the administrator have gave a permission to. Once your MAC passes the verification, device gets connected to the network and then I'm asked to enter username and password through WEB browser (well known for me, because it is a procedure that I do on my other device, as well as all my colleagues do).
For example, I was allowed to provide one personal MAC address to administrator to connect to this network. I would like to set the MAC address of my other personal device and set it on my I9195 so that I can access the same network.
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I have a plan to upgrade Android to version 4.4.2 later today and make a test.
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Kind regards,
QUICK REPLY: After installing CyanoGEN MOD 4.4.2, the problem remains!
I think there could be a shorter solution! On Sony Xperia Acro S with 4.1.2 Android it was just a matter of changing the MAC address within the file data/etc/wifi/fw! One minute modification...
So, please, if somebody knows the path to the file that contains MAC on CyanoGEN MOD 4.4.2 or on Android 4.2.2, PLEASE HELP!
Kind regards!

[Q] WiFi won't connect automatically (while screen is on)

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SOLVED
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ok using this app : https://play.google.com/store/apps/details?id=com.ddm.iptools
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Hi,
as titled , my LG G4 won't connect to my TPLink wifi extender (RE210) while other devices do. It gets stuck in obtaining IP address and gives up...
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