python

I need to set up the question ask user what type of the device they use and ask them question them print out the solution!
e.g. : computer: What type of OS you use?
          users: IOS
          computer: is your screen working?
          users:.........
Then I write that program but it don't work, can someone help please?

s1 = ('if you drop it into the water then try to put it into the rice, if not please replace the screen! ')
s2 = ('please go to the local shop to check your phone!')
s3 = ('please repleace the button!')
s4 = ('please turn on the power!')
s5 = ('Please try with different charge')
s6 = ('please charge your phone fully')
s7 = ('please replace your batter')
s8 = ('please delete some app for your phone to install a new app')
s9 = ('please turn up the volume')
s10 = ('please replease the speaker frome your phone!')
s11 = ('That good! If you have other any problem please go to our shop and check with the staff')
def android():
problem1=None
while problem1 not in ('yes', 'no'):
     problem1=input("Is your screen working?")

if problem1=='no':
    problem2=None
    while problem2 not in ('yes', 'no'):
        problem2=input('have you drop your phone or have you drop it into the water?')

    if problem2=='yes':
        print(s1)
    elif problem2=='no':
        print(s2)

elif problem1=='yes':
    problem3=None
    while problem3 not in ('yes', 'no'):
        problem3=input('is the button working?')

    if problem3=='no':
        print(s3)
    elif problem3=='yes':
        problem4=None
        while problem4 not in ('yes','no'):
            problem4=input('when you charge your phone have the screen show anything or have the light at the top appear?')

        if problem4=='no':
            problem5=None
            while problem5 not in('yes','no'):
                problem5=input('is the power on')

            if problem5=='yes':
                print(s5)
            elif problem5=='no':
                print(s4)

        elif problem4=='yes':
            problem6=None
            while problem6 not in('yes','no'):
                problem6=input('is your phone fully charge')

            if problem6=='no':
                print(s6)
            elif problem6=='yes':
                problem7=None
                while problem7 not in('yes','no'):
                    problem7=input('can you turn on your phone?')

                if problem7=='no':
                    print(s7)
                elif problem7=='yes':
                    problem8=None
                    while problem8 not in('yes','no'):
                        problem8=input('can you install any new app')

                    if problem8=='no':
                        print(s8)
                    elif problem8=='yes':
                        problem9=None
                        while problem9 not in('yes','no'):
                            problem9=input('is the sound working?')

                        if problem9=='no':
                            problem10=None
                            while problem10 not in('yes','no'):
                                problem10=input('have you turn the nolume up?')
                            if problem10=='no':
                                print(s9)
                            elif problem10=='yes':
                                print(s10)
                                greeting = print("what Operating System you have?Anroid or IOS?")
                                if greeting=='Android':
                                    print(android)
def IOS():
    problem1 = None
while problem1 not in ('yes', 'no'):
    problem1=input("Is your screen working?")

if problem1=='no':
    problem2=None
    while problem2 not in ('yes', 'no'):
        problem2=input('have you drop your phone or have you drop it into the water?')

    if problem2=='yes':
        print(s1)
    elif problem2=='no':
        print(s2)

elif problem1=='yes':
    problem3=None
    while problem3 not in ('yes', 'no'):
        problem3=input('is the button working?')

    if problem3=='no':
        print(s3)
    elif problem3=='yes':
        problem4=None
        while problem4 not in ('yes','no'):
            problem4=input('when you charge your phone have the screen show anything or have the light at the top appear?')

        if problem4=='no':
            problem5=None
            while problem5 not in('yes','no'):
                problem5=input('is the power on')

            if problem5=='yes':
                print(s5)
            elif problem5=='no':
                print(s4)

        elif problem4=='yes':
            problem6=None
            while problem6 not in('yes','no'):
                problem6=input('is your phone fully charge')

            if problem6=='no':
                print(s6)
            elif problem6=='yes':
                problem7=None
                while problem7 not in('yes','no'):
                    problem7=input('can you turn on your phone?')

                if problem7=='no':
                    print(s7)
                elif problem7=='yes':
                    problem8=None
                    while problem8 not in('yes','no'):
                        problem8=input('can you install any new app')

                    if problem8=='no':
                        print(s8)
                    elif problem8=='yes':
                        problem9=None
                        while problem9 not in('yes','no'):
                            problem9=input('is the sound working?')

                        if problem9=='no':
                            problem10=None
                            while problem10 not in('yes','no'):
                                problem10=input('have you turn the nolume up?')
                            if problem10=='no':
                                print(s9)
                            elif problem10=='yes':
                                print(s10)
                                greeting = print("what Operating System you have?Anroid or IOS?")
if greeting=='Android':
     print(android)
elif greeting=='IOS':
          print(IOS)
else:
               print("...")

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