SIM7600E-H on Raspberry Pi 4 model B not receiving GPS data

Question

I'm not able to receive GPS data.

The jumpers are placed in the top position (A)

AT commands return the following:

>>> ser = serial.Serial("/dev/ttyUSB2",115200)

>>> ser.write(('AT+CGPS=1,1'+  '\r\n' ).encode())
13
>>> 
>>> ser.write(('AT+CGPS?'+  '\r\n' ).encode())
10
>>> ser.write(('AT+CGPSINFO'+  '\r\n' ).encode())
13

python code ####################################### '''

import RPi.GPIO as GPIO

import serial
import time
import pynmea2

ser_send = serial.Serial('/dev/ttyUSB2',115200,timeout=1)
ser_receive = serial.Serial('/dev/ttyUSB1',115200,timeout=1)
ser_S0 = serial.Serial('/dev/ttyS0',115200,timeout=1)

def parseGPS(string):
    if 'GGA' in string:
        msg = pynmea2.parse(string)
        print(str(msg))
        print("Timestamp: %s -- Lat: %s %s -- Lon: %s %s -- Altitude: %s %s" % (msg.timestamp,msg.lat,msg.lat_dir,msg.lon,msg.lon_dir,msg.altitude,msg.altitude_units))
    else:
        print(f' doesnt contain GGA: {string}')

def check_conn(conn):
    return conn.name, conn.is_open

def send_at(command,expected_result,timeout):
    name, state = check_conn(ser_send)
    print(f'{name} is {state}')
    
    rec_buff = ''
    if state:

        ser_send.write((command+'\r\n').encode())
        time.sleep(timeout)
        if ser_send.inWaiting():    #something was received in the buffer
            time.sleep(0.01 )
            rec_buff = ser_send.read(ser_send.inWaiting())   # read the buffer
        if rec_buff != '':
            if expected_result not in rec_buff.decode():
                print(command + ' ERROR')
                print(command + ' returned:\t' + rec_buff.decode())
                return False
            else:
                print(f'---------- response from AT command: {rec_buff.decode()}')
                return True
        else:
            print('GPS is not ready, returned nothing')
            return False

def get_gps_position():
    rec_null = True
    answer = False
    gps_started = False
    print('Start GPS session...')
    while not gps_started:
     
        rec_buff = ''
        send_at('AT+CGPS=1,1','OK',1)
        time.sleep(2)
        gps_status= send_at('AT+CGPS','OK',1)
        if gps_status:
            gps_started = True
    while 1:
        answer = send_at('AT+CGPSINFO','+CGPSINFO: ',1)
        #readings = list()
        print('######################## USB1  ')
        while ser_receive.inWaiting() >0:
            readings = ser_receive.readline().decode()
            parseGPS(readings)
            #readings.append(ser_receive.readline())
        # testing another port
        print('######################## S0  ')
        while ser_S0.inWaiting() >0:
                        readings = ser_S0.readline().decode()
                        parseGPS(readings)

        if answer:
            answer = False
            rec_buff = ser_send.read(ser_send.inWaiting()).decode()
            if ',,,,,,' in rec_buff:
                print('GPS is not ready')
                #rec_null = False
                print(f'{ser_receive.name} received {readings}')

                time.sleep(2)
            else:
                print(f'{ser_receive.name} received {readings}')
                time.sleep(2)
        else:
            print('error %d'%answer)
            rec_buff = ''
            send_at('AT+CGPS=0','OK',1)
            return False
        time.sleep(1.5)

'''

#######################################

All I see is this:

/dev/ttyUSB2 is True AT+CGPS ERROR AT+CGPS returned: AT+CGPS ERROR