lte.isattached() is always false

[misterlisty]

Anyone suggest why lte.isattached() is always false..we are using telstra nework if that helps. Has the latest dev firmware 1.20... using the fipy

import time
import machine
from network import LTE

wait_time = 1

def wait():
print("Waiting {}".format(wait_time))
time.sleep(wait_time)

lte = LTE()

print("Resetting ... ", end='')
reply = lte.send_at_cmd('AT^RESET')
print("DONE: {}".format(reply))
wait()

carrier = 'Telstra Mobile'

def status():
print("")
print("Status")
print(lte.send_at_cmd("ATI"))
print(lte.send_at_cmd('AT!="showphy"'))
print(lte.send_at_cmd('AT!="fsm"'))
print("")

def do(command, sleep_time):
print("Sending: {}.".format(command))
response = lte.send_at_cmd(command)
print("Response: {}".format(response))
wait()
return response

def getLTE():
if lte.isconnected(): return lte
if not lte.isattached():
print('attaching ', end=''); lte.attach()
while not lte.isattached(): print('.', end=''); time.sleep(1)
if not lte.isconnected():
print('connnecting ', end=''); lte.connect()
while not lte.isconnected(): print('.', end=''); time.sleep(1)
return lte

do('AT+CGDCONT=1,"IP","telstra.m2m"', 1)

do('AT!="addscanfreq band=28 dl-earfcn=9410"', 1) # in place of: lte.attach(band=28)

do('AT+CFUN=1', 1)

getLTE()

do('AT+COPS=?', 1)
result = do('ATI', 1)

r=requests.get('http://micropython.org/ks/test.html'); print(r.text)
lte.disconnect()