Dialing or Dialling: How To spell?
The word Dialing is misspelled against Dialling, which is present continuous of "Dial"
Dialling has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings dia & ing which should not be misspelled with single 'L'
Wrong Spelling:  dia-l-ing  Correct Spelling:  dia-ll-ing 
Find more wrongly spelled words of Dialling to spell it well.