I tried taking pic of moon with my mobile camera, i tried auto mode and manual mode also. but its not clear. what are different option or addition tool required.
Unless you have a multi-camera phone with a very strong telephoto option, the moon is much too small in the frame to give usable results even with modern, high resolution sensors.
A single camera phone will have something like a 24mm or 28mm equivalent lens. Which will make the moon look tiny in your frame - digital zoom will only help you magnify it a few times before you run out of resolution reserves.
DSLR/DSLM/superzoom users use 300mm to 1000mm equivalent lenses for good moon pictures...
It's sort of unexpected but the moon is really small. Phone cameras are not really useful here; you want equivalent focal lengths of 600mm to maybe 2000mm. You do not need or want a DSLR for that: older superzoom or hyperzoom cameras with small sensor (the current standard for "small sensor" tends to be 1/2.3") behind a long lens will do the trick and will neither bust your budget (specifically since you are thinking about buying a used smartphone insteaed) nor your arm strength.
Of course, mounting a more ordinary camera (assuming you get it to mount) behind an ordinary telescope will allow you to do astrophotography reasonably well. Like with mounting a camera on a microscope, being able to use general purpose optics rather than something specifically fit to the camera may give you a solution without special purpose pricing.
Instruction may vary as each version of Android may be slightly different:
On the left taskbar you'll see a JPG icon. Tap thereon and it'll switch to RAW JPG. this may allow corrections to be made to the image after the image has been taken.
Change the Exposure Value by tapping the EV option on screen and selecting a coffee exposure.
Select the ISO option and choose a worth of between 80 and 100.
Increase the shutter speed, using the S option on screen, and choose the longest option. this may take longer to require the photo so staying still is crucial .
Take your shot! Once you're pleased with the way your image appears on the screen, click the circular capture button at the bottom of the app.