Network registration is disabled by default. Enable network registration and roaming when network is started. drivers/isimodem/debug.c | 5 ++ drivers/isimodem/network-registration.c | 85 +++++++++++++++++++++++++++++++ drivers/isimodem/network.h | 12 ++++- 3 files changed, 101 insertions(+), 1 deletions(-)