Peter Suge wrote: Here is the pcap: https://docs.google.com/open?id=0B1aXbMU98OahcWp3cVRRWEJBeHc The phone cannot communicate any GPRS data after the message in packet 480 (sent upon power up), which is also when the console shows a message like this below (not actual message from attached pcap): <0012> gprs_bssgp.c:347 BSSGPTLLI=0x7d3b6971 Rx UPLINK-UNITDATA <0013> gprs_llc.c:478 LLC SAPI=1C FCS=0x35b15fCMD=UI DATA <0013> gprs_llc.c:742 LLC RX:unknown TLLI 0x7d3b6971, creating LLME on the fly Others on this mailing list asked for the config files. Here is the nanobts config, which follows the example on the instructions in the wiki for GPRS, with the main differences being allowing all devices to attach and I set the IP addresses. Also, I put the PDCH in the last two timeslots. https://docs.google.com/file/d/0B1aXbMU98OahcGFFWkRIcE54NDQ Here is the SGSN config: https://docs.google.com/open?id=0B1aXbMU98OaheVFqdUhYZWkwQzg There are some strange things in the BCCH configuration in packet #240 of the pcap that don't match configuration files. For example, I have set cell reselection hysteresis as shown in the openbsc.cfg to 4, but the BCCH configuration packet #240 has the value of 2. Let me know if you see anything, and I appreciate your feedback. John