Your frequencies are different than ours so go here to get the lengths you need
Antenna Elmer
I cant find the website but you will need to get the connector for the end of the phone, it should be a SMA, then adapt to the coax cable.
Next get 2 3/4" pvc pipe caps and about 2 foot of pvc pipe.
The 14ga copper wire antenna will get soldered to the center of a coax connector that gets threaded into 1 PVC cap.
measure 1/4 wavelength, bend 90deg, make a loop just smaller than the inside of the pipe, then 90 deg bend straight again. Measure 5/8 wavelength and cut.
Encase in pvc pipe to protect and youre done.
Similar antennas are made for wifi reception. Sorry I have to run or I'd google it.
I also made a double bi-quad that worked awesome