> I have noticed that sometimes the jetpack feels hot. Does that affect the device?
Heat is the bane of all electronic things. Proper heat mitigation is important to the longevity and stability of our devices. I suggest powering down the device a little to let it cool, perhaps even reseating the battery to make sure it has a good connection. Unplug it from the wall if you happened to have it plugged in.
Often times a good solution for temporary performance problems is reseating the SIM card too. You can do this while the device is powered down. Remove the battery and the SIM card underneath for around 30-60 seconds. Then reassemble and try again after the device has cooled.