SOLVED: Yun and Telefonica GSM shield

This topic has been discussed before but most of the posts are very old that's why I'm reposting.

Two questions:

1 - is is true that in order for the shield to work I just need to bend Pin2 of the shield and make a jump to Pin8?

2 - There is no need at all to change any configuration in the sketch?

I have tried #1 above but still no joy.

Many thanks in advance

Regards

Answer is here: