GSM/GPRS/GPS arduino shield

[kumar-8]

Hi guys I am working with
gsm/gprs/gps shield
dfrobot.com/wiki/index.php/GPS/GPRS/GSM_Module_V3.0_(SKU:TEL0051)

arduino uno R2/R3

SIMS:AT&T, verizon,sprint

I am working on a project which collects the gps data and send to the mobile via sms using gsm module

I am using example codes which are given in the above link for sending sms and getting gps data.I can get some gps data but i could not work in gsm mode as the system is not getting connected to network so I cannot send sms or make a call.I have disabled the sim’s pin number,had checked with the frequencies as AT&T supports Quad Band 850 / 900 / 1800 / 1900 MHz.

So can you suggest me what to do to get a network(as my leds are blinking @64ms/800ms approx).I am attaching my work so that it can be helpful to guide me.
Thanks

[kumar-8]

GPS RESULT.pdf (43.8 KB) these are my some other documents.

[carlitos]

are you using the provided sample code? There are many factors that can fail (power, connections, communication settings). Please provide an itemized list of what you did so we can help you out.

[kumar-8]

These are some other attachments

[kumar-8]

Hi Casmat,
Yes I’m using the sample code provided and also tried with other codes.
I tried with different power and communication settings like
1)Powering up with arduino uno using usb connection and arduino ide(9600 baud rate,databits-8 no parity)
2)Giving separate powers sources (9v battery,20V power supply @6-8V)to board and shield with 4800,9600,…,115200
Used different AT commands listed in the data sheet given in the website and the AT module tester.I attached my results so you can get clear idea of my trails.