When you are at a location with bad data coverage, your smart phone and apps will be rendered useless.
However, SMS text messaging may still work, you can get METAR, TAF or more by texting.
Text the keyword HELP to +1 (650) 446 6777 from any phone for instructions.
Words are NOT case sensitive.
For worldwide METAR or TAF, send keyword METAR or TAF followed by ICAO airport name.
METAR KPAO or TAF KSFO or METAR EIDW (Dublin, Ireland)
For hourly reports, send keyword SUB or SUBSCRIBE followed by keyword TAF or METAR and ICAO airport name.
SUB METAR KSJC
To stop, send STOP METAR KSJC