That’s a good idea. Next time my buddy comes over to help work on the house I’ll ask him. He’s got Verizon.
I had this issue last year when I moved to my current house. Nobody gets cell service at my house unless they walk in the yard to get 1 bar. I have AT&T and after months of calls and emails it turns out they straight up dont even make or offer wifi connected cellular boosters anymore. I ended up having to buy a different phone and have been surviving off of wifi calling ever since…
Really is a big gap in the market. And I believe even if you buy 2nd hand ones they have to be activated by AT&T and ties to your account. So I imagine that wouldn’t be a fun process either.
Cell 1
Cell Identifier xxxxxxxxx
System Subtype LTE
PCI xxxxxxxxx
EARFCN xxxxxxxxx
Maximum Signal (RSRP) -68 dBm
Direction E (106°)
First Seen Tue, Jun 11, 2019
Last Seen Tue, Jun 11, 2019
Uplink Frequency 831.5 MHz
Downlink Frequency 876.5 MHz
Frequency Band CLR (B5 FDD)
Cell 3
Cell Identifier xxxxxxxxx
System Subtype LTE
PCI xxxxxxxxx
EARFCN xxxxxxxxx
Maximum Signal (RSRP) -75 dBm
Direction W (286°)
First Seen Tue, Jun 11, 2019
Last Seen Tue, Jun 11, 2019
Uplink Frequency 831.5 MHz
Downlink Frequency 876.5 MHz
Frequency Band CLR (B5 FDD)
Cell 9
Cell Identifier xxxxxxxxx
System Subtype LTE
PCI xxxxxxxxx
EARFCN xxxxxxxxx
Maximum Signal (RSRP) -72 dBm
Direction S (176°)
First Seen Tue, Jun 11, 2019
Last Seen Tue, Jun 11, 2019
Uplink Frequency 1890 MHz
Downlink Frequency 1970 MHz
Frequency Band PCS blocks A-F (B2 FDD)
Cell 9
Cell Identifier xxxxxxxxx
System Subtype LTE
PCI xxxxxxxxx
EARFCN xxxxxxxxx
Maximum Signal (RSRP) -96 dBm
Direction SW (227°)
First Seen Wed, Jun 12, 2019
Last Seen Wed, Jun 12, 2019
Uplink Frequency 1887.5 MHz
Downlink Frequency 1967.5 MHz
Frequency Band PCS blocks A-F (B2 FDD)
Cell 10
Cell Identifier xxxxxxxxx
System Subtype LTE
PCI xxxxxxxxx
EARFCN xxxxxxxxx
Maximum Signal (RSRP) -94 dBm
Direction SW (228°)
First Seen Tue, Jun 11, 2019
Last Seen Tue, Jun 11, 2019
Uplink Frequency 1887.5 MHz
Downlink Frequency 1967.5 MHz
Frequency Band PCS blocks A-F (B2 FDD)
Cell 15
Cell Identifier xxxxxxxxx
System Subtype LTE
PCI xxxxxxxxx
EARFCN xxxxxxxxx
Maximum Signal (RSRP) -115 dBm
Direction N (0°)
First Seen Tue, Jun 11, 2019
Last Seen Tue, Jun 11, 2019
Notes B12 MFBI
Uplink Frequency 709 MHz
Downlink Frequency 739 MHz
Frequency Band Lower SMH blocks B/C (B17 FDD)
Cell 17
Cell Identifier xxxxxxxxx
System Subtype LTE
PCI xxxxxxxxx
EARFCN xxxxxxxxx
Maximum Signal (RSRP) -110 dBm
Direction NE (48°)
First Seen Tue, Jun 11, 2019
Last Seen Tue, Jun 11, 2019
Notes B12 MFBI
Uplink Frequency 709 MHz
Downlink Frequency 739 MHz
Frequency Band Lower SMH blocks B/C (B17 FDD)
Cell 17
Cell Identifier xxxxxxxxx
System Subtype LTE
PCI xxxxxxxxx
EARFCN xxxxxxxxx
Maximum Signal (RSRP) -93 dBm
Direction NE (46°)
First Seen Tue, Jun 11, 2019
Last Seen Tue, Jun 11, 2019
Notes B12 MFBI
Uplink Frequency 709 MHz
Downlink Frequency 739 MHz
Frequency Band Lower SMH blocks B/C (B17 FDD)
These are the towers in your area from what I anayzed (Ive removed the PII) from the towers…
From all the info you gave me it seems unplausible that you couldnt support LTE within your home. So this is what might be going on. You are with straight talk. The way AT&T throttles is degradation of service. Even if your not being throttled any network not considered to be the main core of AT&T like straight talk AT&T can throttle based on RSRP. They do it … its obvious why since its an MVNO and its a virtual carrier licensing from the network. Even if you have the signal strength to support it this LTE at full rate this is what they do. Ive seen it many times over again. Its not “super evil” but its a little shady however I guess its in their best interest and it is not illegal
My suggestion… Try switching from AT&T to tmobile on straight talk… see if that makes any difference 
should be similar pricing… or better yet see what Tmobile has in your area and see what kind of plans you could afford. Its always better to buy directly from the carrier… Its an illusion that the other smaller carriers are better since all they really are is VNOs who license from the big 3