# GPRS Attach failed : AT+CGATT=1 **URL:** \ **Category:** Open AT\ **Created:** [June 5, 2006, 10:43am UTC](https://forum.sierrawireless.com/t/gprs-attach-failed-at-cgatt-1/497 "2006-06-05T10:43:05Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![stackoverflow](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/stackoverflow/32/2575_2.png) [@stackoverflow](https://forum.sierrawireless.com/u/stackoverflow)\ **Post date:** [June 5, 2006, 10:43am UTC](https://forum.sierrawireless.com/t/gprs-attach-failed-at-cgatt-1/497/1 "2006-06-05T10:43:05Z")
Hi all, i have a wavecom fastrack and i am located in tunisia, our operator support GPRS ans my SIM Card is GPRS Enabled, i have tested it in my mobile phone and also support wap features. When i inserted the SIM in wavecom module, the equipment dont replay for GPRS command and i cannot make a GPRS Attach. Can someone help me ? This is a some responses of the equipment : at+cgclass=“B” (class “B”) OK +CREG: 1 (GSM Attached) at+cmee=1 (Report for GPRS Error) OK at+cgreg? (Ask for current GPRS Status) +CGREG: 2,0 (Detach : 0) OK at+cgreg=1 (Activate registration on GPRS) OK +CGREG: 0 (Also GPRS Detach) at+cgatt=1 (set GPRS Attach Manually {class “B”} ) +CME ERROR: 148 (Unknown GPRS Error) +CGREG: 2 (Failed to log onto GPRS mode) +CGREG: 0 (Attempting to Access to GPRS mode) at+cgatt=1 (Attach Mobile to GPRS) +CME ERROR: 148 (Same problem: Unknown GPRS Error) +CGREG: 2 (Failed) +CGREG: 0 (Attempting to Access to GPRS) OK at&w (Save) OK at+cfun=1 (Reset Equipment) OK +CREG: 2 (Failed in GSM Mode) +CREG: 1 (GSM Mode enabled) at+cgatt=1 (set GPRS Attach Manually {class “B”} ) +CME ERROR: 148 (Unknown GPRS Error) +CGREG: 2 +CGREG: 0 ati3 (Ask for Version) 650a09gg.Q2406B 1949844 122204 14:53 (firmware version 6.50; gg : GSM GPRS support) OK at+cops=0 (Auto registering to home network) +CME ERROR: 515 (init in progress) at+csq +CME ERROR: 515 (init in progress) at+cpin? +CME ERROR: 515 (init in progress) at+cfun=1 (Reset) OK at+cmee=1 OK +CREG: 2 +CREG: 1 (GSM Attached) ati3 650a09gg.Q2406B 1949844 122204 14:53 OK at+csq (Signal quality) +CSQ: 31,0 +CSQ: 31,99 +CSQ: 31,0 OK at+cced=0 (Equipment information) +CCED: 605,03,006b,3b08,60,105,60,0,0,605,03,006b,4151,62,111,46,605,03,006b ,3b09,58,107,43,605,03,0068,30ad,53,114,36,605,03,006b,56,115,34,605,03,0068,6 1,848,20,605,03,006b,3ac7,60,847,15,1 OK OK at+cgatt=1 +CME ERROR: 148 (Unknown GPRS Error) +CGREG: 2 +CGREG: 0 (GPRS Detach) AT+COPS=0 (The Equipment don’t Replay, and all other command don’t work except AT+CFUN=1) ---
**Author:** ![sendog](https://avatars.discourse-cdn.com/v4/letter/s/b4bc9f/32.png) [@sendog](https://forum.sierrawireless.com/u/sendog)\ **Post date:** [June 19, 2006, 10:50am UTC](https://forum.sierrawireless.com/t/gprs-attach-failed-at-cgatt-1/497/2 "2006-06-19T10:50:19Z")
Hi, I guess you should define APN before attaching to GPRS. You can do this with AT+CGDCONT command. sendog ---
**Author:** ![wavelet](https://avatars.discourse-cdn.com/v4/letter/w/0ea827/32.png) [@wavelet](https://forum.sierrawireless.com/u/wavelet)\ **Post date:** [September 23, 2006, 2:04am UTC](https://forum.sierrawireless.com/t/gprs-attach-failed-at-cgatt-1/497/3 "2006-09-23T02:04:45Z")
Try detaching from the GSM and then attach to the GPRS, provided your all other setting are configured. If I remember correctly, you cannot be attached to both. MK ---
**Author:** ![tomalex](https://avatars.discourse-cdn.com/v4/letter/t/71e660/32.png) [@tomalex](https://forum.sierrawireless.com/u/tomalex)\ **Post date:** [September 25, 2006, 9:33pm UTC](https://forum.sierrawireless.com/t/gprs-attach-failed-at-cgatt-1/497/4 "2006-09-25T21:33:03Z")
Hello stackoverflow, Have you solved the problem? It seems to me strange according to your parameters. If your SIM card is really GPRS enabled i think it is someway an incompatibility problem. Try to use the latest gsm core software. (6.55 or 6.57) In case of GSM voice call that modem is CLASS B so you can be attached to both GPRS and GSM. (GPRS suspended during voice call or SMS). You can attach to GPRS without activating a PDP context. Best Regards, tom