I installed them on my AT&T LTE modem and they haven't changed. The signal level is still around 1-2 bars (-110-115 dBm). This model may not support an external antenna, but there are definitely ports for it. So it's not clear if the problem is with the modem or with this product.
π‘ MikroTik LHG 5: High-Gain Dual Polarization Grid Antenna, Enhanced 5 GHz Performance (US Version)
9 Review
Boost Mobile Signal with 4G LTE Antenna TS9 - Dual πΆ Mimo WiFi Amplifier for Huawei Hotspot - Long Range High Gain Antenna
9 Review
Asus RP-N12 N300 WLAN Repeater π 802.11 B/G/N - Boost Your Wireless Range!
10 Review
πΆ Hawking HAI6SIP: Boost Your Wireless Signal Range with Hi-Gain 6dB Omni-Directional Antenna
9 Review
π uni USB C Hub with Ethernet Adapter, 4K HDMI, Gigabit Ethernet, and 3 USB 3.0 Ports for MacBook Pro, iPad Pro, XPS
11 Review
HB-UMLS Sabrent USB 2.0 Hub with 4 Ports and LED Power Switches for Each Port
12 Review
π CERRXIAN RS232 to Ethernet Serial Device Server - TCP/IP Converter with 1Port DB9 RS232 Serial to Ethernet Connectivity
3 Review
π USR-TCP232-410s: RS232/RS485 Serial to Ethernet Adapter/IP Device Server with DHCP/DNS Support
4 Review