HydTech

Once I knew what I was doing, everything was simple.
Here are the steps for the G1:

1. Update recovery image (Optional but recommended)

a. download the cyanogenmod recovery image and place it in your SDcard.

b. open up terminal and type
su
mount -o rw,remount -t yaffs2 /dev/block/mtdblock3 /system
cd /sdcard
flash_image recovery /sdcard/cm-recovery-1.4.img
cat cm-recovery-1.4.img > /system/recovery.img

2. Update cupcake to donut

a. download the 1.6 image here and place it in the sdcard

b. download the mod image here and place it in the sdcard

c. turn off phone

d. boot into recovery mode by pressing home + power

e. from the recovery menu you can select nandroid to backup for safety (optional)

f. alt+ w to wipe (optional)

g. alt + a to apply, first select the 1.6 image and let it complete

h. Do not restart!

i. alt + a to apply, select the cyanogemod image and let it complete

j. reboot

I am so happy, I canceled my T-mobile contract and now I use my G1 to make free VOIP calls using gizmo5 and google voice. I have a wireless connection while I’m at home and at work so thats like 90% of my day. At times when I don’t have a connection, the phone calls get forwarded to my prepaid t-mobile card which is good for 1 year. I paid $100 for it for 1000 minutes.

Things needed before you get started:
1. Sign up for a google voice account and set it up. You can purchase an invite from ioffer.com for like $2.
2. Gizmo5 account. you need to download the desktop client and register. Once you have your sip number (something like 747*******), write it down.
3. SIPdroid app for android
4. Unofficial GV app for android
5. Optional: prepaid sim card

Log in to your google voice account and under settings you can add a phone where you would like your GV number to forward to. Make sure you select type “gizmo” and add the 747 sip number. GV will ask to verify the number so you have to make sure you are signed into your gizmo.

On your android, open sipdroid and enter your account settings.
the server is proxy01.sipphone.com
port is 5060
protocol: UDP is better
You will get a green dot when connected.

Open the GV app (make sure its the unofficial one) and enter your account settings. select calling method as ‘call back’. call back number is your sip number. enter it and enter your pin.
* If you choose the ‘dial out’ method, you will need credits to place a call with gizmo5. the ‘call back’ method tells google voice to dial your number and then once connected with you, call the other number. (This is better because incoming calls are free)

Now you can make and receive calls free while your on Wifi or 3g. In case you want your offline calls forwarded to your prepaid phone, you can select call hunting feature in your gizmo5 account settings.

Enjoy!

Intro

The G1 does not connect to ad hoc networks through the wifi manager but we can hack it to allow scanning and connecting to ad hocs. I’ve been trying to figure this out for the longest time. Before you begin, you need to root your G1 and be comfortable using the command line. We will be editing tiwlan.ini and wpa_supplicant.conf. I will be showing you 2 ways to edit the files. Using vi and adb.

Settings

edit tiwlan.ini to read:

WiFiAdHoc = 1
dot11DesiredSSID = HydtechAdhoc (or whatever name u want)
dot11DesiredBSSType = 0

edit wpa_supplicant.conf to read:

ctrl_interface=tiwlan0
update_config=1
eapol_version=1
ap_scan=2 (tells wpa_supplicant to scan hidden networks)

network={
ssid=”HydtechAdhoc”
scan_ssid=1 (for APs with multiple SSIDS)
mode=1
key_mgmt=NONE
group=WEP104
auth_alg=SHARED
wep_key0=”MyWepKey” (replace MyWepKey with your key)
}

How to edit using vi:

Download terminal from the market and type:

su (for superuser mode)
mount -o rw,remount -t yaffs2 /dev/block/mtdblock3 /system (mount partition as writable)
vi /system/etc/wifi/tiwlan.ini (open tiwlan.ini in vi text editor)

now type A to enter editing mode, finish editing your file and hold trackball+1 to stop editing. To save and exit type :wq

vi /data/misc/wifi/wpa_supplicant.conf (open file for editing)

edit with the settings given above and exit and don’t forget to change the partition back to read only
mount -o ro,remount -t yaffs2 /dev/block/mtdblock3 /system

reboot

How to edit files with adb on Ubuntu:

Connect your g1 to the computer using a usb cable and make sure USB debugging in enabled
Open up terminal and type
cd /home/hydtech/[android sdk folder]/tools (navigate to the directory which has you adb tool)

get the files from the device and place them in the root folder
sudo ./adb pull /system/etc/wifi/tiwlan.ini /
sudo ./adb pull /data/misc/wifi/wpa_supplicant.conf /

edit and save the files with the settings provided above using gedit or kate or what have you

make the partition read writable
adb shell
mount -o rw,remount -t yaffs2 /dev/block/mtdblock3 /system
exit

place the files back onto the device
sudo ./adb push /tiwlan.ini /system/etc/wifi/tiwlan.ini
sudo ./adb push /wpa_supplicant.conf /data/misc/wifi/wpa_supplicant.conf

make partition read only again
adb shell
mount -o ro,remount -t yaffs2 /dev/block/mtdblock3 /system
exit

reboot device.

Troubleshooting

shows connected but no internet
1. I was having a problem where the connection would keep disconnecting and when it would connect, it wouldn’t load pages. To fix this I had to disable my WEP key.

SSID not showing
2. If the SSID isn’t showing up in the list, make sure you have ap_scan=2 in your wpa_supplicant

Unsuccessful connection
3. Try enabling static IP if DHCP isn’t working for you. It’s under advanced menu.

This is the first theme I made for the G1 Android. It’s for use with aHome or aHome lite. I published it in the market for $0.99. Hope you like it.