Vital: If you are planning to use the SMA connector for the antenna, be sure that a 0 Ohm resistor is populated. Several consumers have described that it's not existing on their modules. Seek advice from the crimson square beside the SMA connector during the diagrams below for The situation. https://edgarsyqnq.bloggerswise.com/37867220/what-does-situs-judi-mbl77-mean