[Galaxy S III Q&A, Help & Troubleshooting] morphy83:
Tested out Wifi connection further. SGS3 I9300XXUGMK6 should connect to raspberry pi hostapd open wifi in debug mode.

Tried to connect a Galaxy Note 10.1 Stock ROM first, connection get established and hostapd creats log.

Tried to connect SGS3 with Nameless2 1711 no connection and no log-information at hostapd.

For your Information komplete Log Information from raspberry hostapd.

Mac Adresse 9d:23 is the Galaxy Note.

No log entry afterwards :(

Hope this helps for fault isolation.

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pi@raspberrypi /tmp $ sudo hostapd -dd /etc/hostapd/hostapd.conf

random: Trying to read entropy from /dev/random

Configuration file: /etc/hostapd/hostapd.conf

ctrl_interface_group=0

drv->ifindex=3

Configure bridge br0 for EAPOL traffic.

BSS count 1, BSSID mask 00:00:00:00:00:00 (0 bits)

Allowed channel: mode=1 chan=1 freq=2412 MHz max_tx_power=0 dBm

Allowed channel: mode=1 chan=2 freq=2417 MHz max_tx_power=0 dBm

Allowed channel: mode=1 chan=3 freq=2422 MHz max_tx_power=0 dBm

Allowed channel: mode=1 chan=4 freq=2427 MHz max_tx_power=0 dBm

Allowed channel: mode=1 chan=5 freq=2432 MHz max_tx_power=0 dBm

Allowed channel: mode=1 chan=6 freq=2437 MHz max_tx_power=0 dBm

Allowed channel: mode=1 chan=7 freq=2442 MHz max_tx_power=0 dBm

Allowed channel: mode=1 chan=8 freq=2447 MHz max_tx_power=0 dBm

Allowed channel: mode=1 chan=9 freq=2452 MHz max_tx_power=0 dBm

Allowed channel: mode=1 chan=10 freq=2457 MHz max_tx_power=0 dBm

Allowed channel: mode=1 chan=11 freq=2462 MHz max_tx_power=0 dBm

Allowed channel: mode=1 chan=12 freq=2467 MHz max_tx_power=0 dBm

Allowed channel: mode=1 chan=13 freq=2472 MHz max_tx_power=0 dBm

Allowed channel: mode=0 chan=1 freq=2412 MHz max_tx_power=0 dBm

Allowed channel: mode=0 chan=2 freq=2417 MHz max_tx_power=0 dBm

Allowed channel: mode=0 chan=3 freq=2422 MHz max_tx_power=0 dBm

Allowed channel: mode=0 chan=4 freq=2427 MHz max_tx_power=0 dBm

Allowed channel: mode=0 chan=5 freq=2432 MHz max_tx_power=0 dBm

Allowed channel: mode=0 chan=6 freq=2437 MHz max_tx_power=0 dBm

Allowed channel: mode=0 chan=7 freq=2442 MHz max_tx_power=0 dBm

Allowed channel: mode=0 chan=8 freq=2447 MHz max_tx_power=0 dBm

Allowed channel: mode=0 chan=9 freq=2452 MHz max_tx_power=0 dBm

Allowed channel: mode=0 chan=10 freq=2457 MHz max_tx_power=0 dBm

Allowed channel: mode=0 chan=11 freq=2462 MHz max_tx_power=0 dBm

Allowed channel: mode=2 chan=36 freq=5180 MHz max_tx_power=0 dBm

Allowed channel: mode=2 chan=40 freq=5200 MHz max_tx_power=0 dBm

Allowed channel: mode=2 chan=44 freq=5220 MHz max_tx_power=0 dBm

Allowed channel: mode=2 chan=48 freq=5240 MHz max_tx_power=0 dBm

Allowed channel: mode=2 chan=52 freq=5260 MHz max_tx_power=0 dBm

Allowed channel: mode=2 chan=56 freq=5280 MHz max_tx_power=0 dBm

Allowed channel: mode=2 chan=60 freq=5300 MHz max_tx_power=0 dBm

Allowed channel: mode=2 chan=64 freq=5320 MHz max_tx_power=0 dBm

Allowed channel: mode=2 chan=100 freq=5500 MHz max_tx_power=0 dBm

Allowed channel: mode=2 chan=104 freq=5520 MHz max_tx_power=0 dBm

Allowed channel: mode=2 chan=108 freq=5540 MHz max_tx_power=0 dBm

Allowed channel: mode=2 chan=112 freq=5560 MHz max_tx_power=0 dBm

Allowed channel: mode=2 chan=116 freq=5580 MHz max_tx_power=0 dBm

Allowed channel: mode=2 chan=120 freq=5600 MHz max_tx_power=0 dBm

Allowed channel: mode=2 chan=124 freq=5620 MHz max_tx_power=0 dBm

Allowed channel: mode=2 chan=128 freq=5640 MHz max_tx_power=0 dBm

Allowed channel: mode=2 chan=132 freq=5660 MHz max_tx_power=0 dBm

Allowed channel: mode=2 chan=136 freq=5680 MHz max_tx_power=0 dBm

Allowed channel: mode=2 chan=140 freq=5700 MHz max_tx_power=0 dBm

Allowed channel: mode=2 chan=149 freq=5745 MHz max_tx_power=0 dBm

Allowed channel: mode=2 chan=153 freq=5765 MHz max_tx_power=0 dBm

Allowed channel: mode=2 chan=157 freq=5785 MHz max_tx_power=0 dBm

Allowed channel: mode=2 chan=161 freq=5805 MHz max_tx_power=0 dBm

Allowed channel: mode=2 chan=165 freq=5825 MHz max_tx_power=0 dBm

Completing interface initialization

Mode: IEEE 802.11b Channel: 8 Frequency: 2447 MHz

RATE[0] rate=10 flags=0x1

RATE[1] rate=20 flags=0x1

RATE[2] rate=55 flags=0x0

RATE[3] rate=110 flags=0x0

Flushing old station entries

Deauthenticate all stations

+rtl871x_sta_deauth_ops, ff:ff:ff:ff:ff:ff is deauth, reason=2

rtl871x_set_key_ops

rtl871x_set_key_ops

rtl871x_set_key_ops

rtl871x_set_key_ops

Using interface wlan0 with hwaddr 64:d1:a3:29:d9:dd and ssid 'RouterExtension'

rtl871x_set_wps_assoc_resp_ie

rtl871x_set_wps_beacon_ie

rtl871x_set_wps_probe_resp_ie

rtl871x_set_beacon_ops

rtl871x_set_hidden_ssid_ops

ioctl[RTL_IOCTL_HOSTAPD]: Invalid argument

wlan0: Setup of interface done.

random: Got 20/20 bytes from /dev/random

Wireless event: cmd=0x8b15 len=20

Wireless event: cmd=0x8c03 len=20

+rtl871x_get_sta_wpaie, d8:90:e8:a5:9d:23 is sta's address

Add randomness: count=1 entropy=0

wlan0: STA d8:90:e8:a5:9d:23 IEEE 802.11: associated

STA did not include WPS/RSN/WPA IE in (Re)AssocReq

New STA

wlan0: STA d8:90:e8:a5:9d:23 RADIUS: starting accounting session 546B7FB4-00000000

IEEE 802.1X: Ignore STA - 802.1X not enabled or forced for WPS

Wireless event: cmd=0x8c04 len=20

wlan0: STA d8:90:e8:a5:9d:23 IEEE 802.11: disassociated

wlan0: AP-STA-DISCONNECTED d8:90:e8:a5:9d:23

+rtl871x_sta_remove_ops, d8:90:e8:a5:9d:23 is sta address removed

Wireless event: cmd=0x8c03 len=20

+rtl871x_get_sta_wpaie, d8:90:e8:a5:9d:23 is sta's address

Add randomness: count=2 entropy=1

wlan0: STA d8:90:e8:a5:9d:23 IEEE 802.11: associated

STA did not include WPS/RSN/WPA IE in (Re)AssocReq

New STA

wlan0: STA d8:90:e8:a5:9d:23 RADIUS: starting accounting session 546B7FB4-00000001

IEEE 802.1X: Ignore STA - 802.1X not enabled or forced for WPS

wlan0: Station d8:90:e8:a5:9d:23 has been active 0s ago