for ua changer my id are this ;

android id14
iphone id15
n900 id16
null id17

but not sure how im editing the command ? i did this but correct ?

for android used in order to replace ids as id14 id15 id16 id17

for iphone used in order to replace ids as id15 id16 id17 id14

for n900 used in order to replace ids as id16 id17 id14 id15

for null used in order to replace ids as id17 id14 id15 id16

cheers , moepda