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EM7455 Lock to Band 41
Posted: Fri Apr 03, 2020 3:08 pm
by terryjett
Using Jim's spreadsheet to generate correct code for locking EM7455 to band 41, but modem will not connect after reset. Before I go into more troubleshooting want to make sure every thing is correct with code.
This is what I have after spreadsheet: AT!BAND=10,"SP41",0,10
Entered that into modem and did reset. Modem would not connect.
Know can get band 41 as modem connected for little while and then got on band 25.
Here is info from modem:
Code: Select all
AT!BAND=?
Index, Name, GW Band Mask L Band Mask TDS Band Mask
00, All bands 0002000007C00000 00000100330818DF 0000000000000000
01, Europe 3G 0002000000400000 0000000000000000 0000000000000000
02, North America 3G 0000000004800000 0000000000000000 0000000000000000
06, Europe 0002000000400000 00000000000800C5 0000000000000000
07, North America 0000000004800000 000000000300185A 0000000000000000
08, WCDMA ALL 0002000007C00000 0000000000000000 0000000000000000
09, LTE ALL 0000000000000000 00000100330818DF 0000000000000000
10, SP41 0000000000000000 0000000000000010 0000000000000000
0000010000000000 - B41
0000000020000000 - B30
0000000010000000 - B29
0000000002000000 - B26
0000000001000000 - B25
0000000000080000 - B20
0000000000001000 - B13
0000000000000800 - B12
0000000000000080 - B8
0000000000000040 - B7
0000000000000010 - B5
0000000000000008 - B4
0000000000000004 - B3
0000000000000002 - B2
0000000000000001 - B1
0002000000000000 - B8 (900)
0000000004000000 - B5 (850)
0000000002000000 - B4 (1700)
0000000001000000 - B3 (1700)
0000000000800000 - B2 (1900)
0000000000400000 - B1 (2100)
OK
Modem is running generic firmware and WE826 is on latest WiFix.
Re: EM7455 Lock to Band 41
Posted: Fri Apr 03, 2020 3:37 pm
by JimHelms
terryjett wrote: Fri Apr 03, 2020 3:08 pm
Using Jim's spreadsheet to generate correct code for locking EM7455 to band 41, but modem will not connect after reset. Before I go into more troubleshooting want to make sure every thing is correct with code.
This is what I have after spreadsheet: AT!BAND=10,"SP41",0,10
Entered that into modem and did reset. Modem would not connect.
Nope, it is not adding them correctly. It should be:
Guess I need to separate the spreadsheets to apply to a single line of modems, as opposed to adding other devices.
Good catch, and I am surprised no one caught it before.
UPDATE: The current spreadsheet seems to calculate them properly.
Create Custom Bands (11-02-19).xlsx
Re: EM7455 Lock to Band 41
Posted: Fri Apr 03, 2020 3:59 pm
by terryjett
That did the trick, thanks Jim.
I was close on my second attempt, my command was one zero short
On band 41 now with jerry rigged antennas:
Code: Select all
AT!GSTATUS?
!GSTATUS:
Current Time: 406 Temperature: 38
Reset Counter: 1 Mode: ONLINE
System mode: LTE PS state: Attached
LTE band: B41 LTE bw: 20 MHz
LTE Rx chan: 41094 LTE Tx chan: 41094
LTE CA state: INACTIVE LTE Scell band:B41
LTE Scell bw:20 MHz LTE Scell chan:41292
EMM state: Registered Normal Service
RRC state: RRC Connected
IMS reg state: No Srv
PCC RxM RSSI: -90 RSRP (dBm): -120
PCC RxD RSSI: -85 RSRP (dBm): -114
SCC RxM RSSI: -98 RSRP (dBm): -120
SCC RxD RSSI: -97 RSRP (dBm): -119
Tx Power: 22 TAC: 1F19 (7961)
RSRQ (dB): -9.2 Cell ID: 03FB0331 (66782001)
SINR (dB): 7.0
Re: EM7455 Lock to Band 41
Posted: Fri Apr 03, 2020 7:12 pm
by BillA
Speaking of Sprint bands, Tmobile is now allowing Sprint customers to roam on the Tmobile network, but not the other way around, yet. Last night I have forced my Tmobile phone onto the three Sprint bands 25, 26, and 41, but no signal at all, hoping it will change soon.
Re: EM7455 Lock to Band 41
Posted: Fri Apr 03, 2020 7:31 pm
by terryjett
BillA wrote: Fri Apr 03, 2020 7:12 pm
Speaking of Sprint bands, Tmobile is now allowing Sprint customers to roam on the Tmobile network, but not the other way around, yet. Last night I have forced my Tmobile phone onto the three Sprint bands 25, 26, and 41, but no signal at all, hoping it will change soon.
Good news to know. All the damn towers around us (at&t, sprint and t-mobile) are so overloaded. might as well be on AOL 56K during peak hours...
Re: EM7455 Lock to Band 41
Posted: Fri Apr 03, 2020 8:17 pm
by BillA
terryjett wrote: Fri Apr 03, 2020 7:31 pm
Good news to know. All the damn towers around us (at&t, sprint and t-mobile) are so overloaded. might as well be on AOL 56K during peak hours...
Teeeeeee-dooooooooo-screeeeeeeech... really miss those old days.... not! lol
This is probably the worst possible time to test the speed on different carriers, because most of them are being overloaded at all times of the day and even night due to this stay-at-home economy.
I will keep on testing my Tmobile phone forced onto Sprint bands, and will post it as soon as it starts working.