Nexus 5 + Straight Talk Unlocked Phone MicroSIM (AT&T) = Fast LTE speeds
Note: I got the MicroSIM very recently after they began offering AT&T SIMs again with the LTE support, it was $7.43 after taxes with free shipping
SpeedTest - Chicago area test to Chicago Comcast server
Test 1
21Mb/s download
7.59Mb/s upload
139 ms Ping
Test 2
18.24 Mbps download
8.17 Mbps upload
85 ms ping
Test 3
21.47 Mbps download
10.55 Mbps upload
84 ms ping
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For comparison purposes, here are results from my old phone:
Galaxy Nexus (GSM) Results using Straight Talk unlocked phone SIM card (old standard mini-SIM) using AT&T 3G
Test 1
7.11 Mbps download
1.13 Mbps upload
118 ms Ping
Test 2
6.93 Mbps download
1.15 Mbps upload
130 ms ping
Note: I got the MicroSIM very recently after they began offering AT&T SIMs again with the LTE support, it was $7.43 after taxes with free shipping
SpeedTest - Chicago area test to Chicago Comcast server
Test 1
21Mb/s download
7.59Mb/s upload
139 ms Ping
Test 2
18.24 Mbps download
8.17 Mbps upload
85 ms ping
Test 3
21.47 Mbps download
10.55 Mbps upload
84 ms ping
------------------------------
For comparison purposes, here are results from my old phone:
Galaxy Nexus (GSM) Results using Straight Talk unlocked phone SIM card (old standard mini-SIM) using AT&T 3G
Test 1
7.11 Mbps download
1.13 Mbps upload
118 ms Ping
Test 2
6.93 Mbps download
1.15 Mbps upload
130 ms ping