Here's a patch to fix network registration with older ISI modems.
Verified with N95.
Claudio, could you give this a spin and let me know if this fixes
the problem for your 6760?
[PATCH 1/1] isimodem: fix network registration for older modems
drivers/isimodem/network-registration.c | 10 ++++++++--
1 files changed, 8 insertions(+), 2 deletions(-)