Invalid URI request

I have this problem and I can't understand how to fix it.

It's works perfectly on ios and on many android devices, but fails on some android ones,

This is the code:

var url = 'http://www.domain.com?';   
url = url + 'name=' + encodeURIComponent($.name.value);
url = url + '&sname=' + encodeURIComponent($.sname.value);
url = url + '&adrs=' + encodeURIComponent($.adrs.value);
 
/*generated url is */
http://www.domain.com?name=NickMatt&sname=Bussoli%20Smith&adrs=20%20Main%20Street