Translation:How many cell phones do the girls have?
It doesn't show up in the dictionaries as a valid spelling. "Cellular phone, cell phone, cell, mobile phone, mobile" is what my dictionary offers me under the headword cell phone.
"Mobiles" is correct, but you entered "hope" instead of "how". Autocorrect is a harsh mistress. :)
Oooops... takk for forklaringen! In that case my answer was definitely rightly not accepted - unnskyld for misbruke funksjonen.