Due to the higher working frequencies of most of the cellular bands (from time to time nicely around the most array of the RTL2832U), I made a decision to switch out the RTL2832U with the HackRF 1. GSM supports indoor protection – achievable by utilizing an indoor picocell base station, https://gsm-data-receiver-atm16034.blogpostie.com/48265089/the-single-best-strategy-to-use-for-gsm-skimmer-device