not sure whats wrong major speed issues

[comptronix]

I am new to this board and want to thank everyone ahead of time for helping with my problem.

I have been using a MOFI4500-4GXeLTE-V2 for over 3 years now with an AT&T unlimited account.
I live out in the sticks and to boost my sign I added some paddle antennas it was enough to give me 1 bar and get me online.

Connected Using: GOBI7455
Interface: eth1
Device Control Port: /dev/ttyUSB2
Manufacturer: Sierra Wireless
Module IMEI: 359072060130263
Module Serial: LQ616203470110
Module Revision: SWI9X30C_02.08.02.00 r5428 CARMD-EV-FRMWR2 2016/01/06 20:38:53
Firmware: GENERIC
Model: MC7455
APN: broadband
Registered on Network: Yes
Operational Mode: LTE
Band: B4 LTE bw: 10 MHz (1700 Mhz)
Carrier Aggregation: INACTIVE LTE Scell band:B4
Signal Strength: -121 (dBm) (Very Poor or No Connection)
Signal Quality: -13.4
Diversity Signal Strength: -120 (dBm)

this info has not changed exept for a couple of dBm up or down like it has always been.


this was enough to give me about 1 mbps up and around 8 down,
A couple days ago I started to experience extreme speed problems sometimes speedtest.net would report slow speed in the single digit kbps when I tried fast.com it even reported 0.0kbps.Without changing anything my speeds would suddenly jump up to double digit Mbps at one point I was getting 29.3 Mbps accounrding to both fast.com and speedtest.net.At first I thought my mofi was broke so I went to a friends house that is closer to the tower and I had no problem getting 15.3Mpbs constant I was able to downloaded a big windows update without a problem.
Does anyone have an idea what part of my settup needs fixing

[MattB29]

It may be you need better or an outdoor antenna setup. However it also could be AT&T and their push to stop people using unlimited accounts (see posts regarding canceled iPad plans). If they are de-prioritizing you it could explain your inconsistent speeds and connection.

ETA: BTW can you set a TTL value (65 or 64) on your router? Might not help but it does not cost anything to try if you do not have one set.

[Viper67857]

An outdoor mimo flat panel antenna definitely couldn't hurt here, maybe even a parabolic grid.. Your signal is on the border of barely usable and non-existant.

[gscheb]

Band: B4 LTE bw: 10 MHz (1700 Mhz)
Carrier Aggregation: INACTIVE LTE Scell band:B4
Signal Strength: -121 (dBm) (Very Poor or No Connection)
Signal Quality: -13.4
Diversity Signal Strength: -120 (dBm)
this info has not changed exept for a couple of dBm up or down like it has always been.

So are you sure that you always used band 4. My parents used to use band 2 on AT&T. Then one day it just disappeared and was stuck with band 4. Band 4 is harder to get and your signal strength pretty bad.
Refer to this chart here.

Signal Metrics.PNG

[comptronix]

I always use band 4 one time after a storm 4 didn't show up so I moved the mofi and used 12/17.
2 doesn't even show up here.