How do I increase my vocal range?

Practice practice practice. You can't find any choirs at all to join? (Try a church, they will often let you sing even if you aren't a member. Yes, it will all be religious, but you will still get vocal training!) Generally, you will warm up doing the range you have - then "stretch" yourself to higher and lower than you can readily reach. Usually on just vowels (no need to try and sing words.) Hope that helps!

I can tell you from my own experience that it will come. When I was a teenager I thought middle "C" was high! Now I can, and do, sing up to the "A" above that. Be patient! Singing in a choir would be great, and lessons even better. Maybe there is someone who would help him for free. A local church musician, maybe?

idk keep practicing

First of all, it fepends on how old you are. If he's younger, his voice most likely isn't changed yet and I wouldn't do anything. DO NOT strain to hit notes that are not comfortable for you to sing. Your voice is changing and you need to wait for it to be done. But do NOT do it alone. you need a professional to help. Can't you join the school chorus? Every school has one, no matter how horrible they sound it's a requirement. If you can't join, maybe talk to the music director at your school, and they can give you more suggestions.

Do deep (diaphramatic) breathing exercises and meditate to relax. Permit yourself to "vocalize" as you inhale and exhale, listening to the changes as you tighten or relax abdomenal muscles. Proper posture is imperative. Be sure to stand tall. Good luck!

listen to music 24/7 and try to emulate the voices of your favorite singers...after lots and lots of practice you might increase your vocal range...or you can take vocal lessons at a music school

same as any other instrument...long tones.....sing high, and sing high, and sing high....and low i guess, too and eventually you'll become more accustomed to going higher/lower

If his voice has not changed, he should be able to sing a lot higher than D. If his voice has changed, he will need to sing in his falsetto. A boys falsetto is his *girly* voice. You need to support with a deep breath and "think" high. It does take practice, I use a lot of visuals for my students, what ever works, singing "over the rainbow", like a bird, like a girl (soprano) You must relax and not push or you will only damage your vocal cords.

just practice.. or something.. tell ur bro that his vocal cords are not right for high pitch or he just simply needs to practice just the high notes