What factors influence international students to choose their mobile phone provider?

Are you at the age of
A 18-20
B 21-23
C 24-26
D above 27
1 How did you get to know these mobile phone providers (multiple choice)
A newspaper
B websites
C TV
D magazine
E popup advertise
e email
F friend recommendation
G poster
H fly sheet
What do you think about when choosing your mobile phone provider
A per minute price
B cell phone signal strength
C service
D the scale of the company
E free minutes calls
F tariff monthly
G the price of international calls
H mobile internet
I popularity
J network flow
please rank the objects (1-5) 5 is most imortant
A per minute price ★ ★ ★ ★ ★
B cell phone signal strength ★ ★ ★ ★ ★
C service ★ ★ ★ ★ ★
D the scale of the company ★ ★ ★ ★ ★
E free minutes calls ★ ★ ★ ★ ★
F tariff monthly ★ ★ ★ ★ ★
G the price of international calls ★ ★ ★ ★ ★
H mobile internet ★ ★ ★ ★ ★
I popularity ★ ★ ★ ★ ★
J network flow ★ ★ ★ ★ ★
If you have had a SIM card already, do you want to change another one
A yes
B no
C not sure