NSURL *url = nil;
NSMutableURLRequest *request = nil;

NSString *getURL = [NSString stringWithFormat:@"%@?TEST=%@",URL, str];

url = [NSURL URLWithString: getURL];
request = [NSMutableURLRequest requestWithURL:url];
[request setHTTPMethod:@"GET"];
[request addValue: @"application/x-www-form-urlencoded; charset=utf-8" forHTTPHeaderField:@"Content-Type"];

NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];

if(connection) //Always true!!!
{
    mutableData = [NSMutableData new];
    NSLog(@"SERVER CONNECTION OK");
}
else
{
    NSLog(@"NO SERVER CONNECTION");
}