You may have a cell signal but no (or prohibitively expensive, in the case of traveling abroad) data access.
Then again, if one of my servers was being hacked, I think I'd be ok spending $50 in data roaming to shut it down.
Although, there's the case of a really slow data. On T-Mobile I'll occasionally get an EDGE signal too useless to even establish an ssh session, let alone be interactive enough to use ssh. A text message can often be much more reliable and easy to use. Not sure about the security implications related to SMS remote control, though.
Then again, if one of my servers was being hacked, I think I'd be ok spending $50 in data roaming to shut it down.
Although, there's the case of a really slow data. On T-Mobile I'll occasionally get an EDGE signal too useless to even establish an ssh session, let alone be interactive enough to use ssh. A text message can often be much more reliable and easy to use. Not sure about the security implications related to SMS remote control, though.