I see.
Ok ive done all in that thread and now I see the relevant ports and modems in Device Manager.
What should i do now?
you can use tera term to open the modem port and type:
AT!entercnd=“A710”
at+cfun?
AT!gstatus?
AT!impref?
I get these
ERROR
+CFUN: 0
OK
!GSTATUS:
Current Time: 7384 Temperature: 38
Reset Counter: 32 Mode: LOW POWER MODE
OK
please enter ATE1 first, otherwise I cannot see what you have entered in tera term.
Sorry my bad
AT!entercnd=“A710”
OK
at+cfun?
+CFUN: 0
OK
AT!gstatus?
!GSTATUS:
Current Time: 499 Temperature: 38
Reset Counter: 33 Mode: LOW POWER MODE
OK
AT!impref?
!IMPREF:
preferred fw version: 02.33.03.00
preferred carrier name: GENERIC
preferred config name: GENERIC_002.072_000
preferred subpri index: 000
current fw version: 02.33.03.00
current carrier name: GENERIC
current config name: GENERIC_002.072_000
current subpri index: 000
OK
OK i followed this
https://www.reddit.com/r/thinkpad/comments/a3yd2j/sierra_wireless_em7455_seems_working_with_my/
Seems that my radio is now working! but no service 
Ok now it works!!!
Thanks so much @jyijyi for your immense help!! 
hi @mohdsubhan08 , im facing the same problem with my lenovo thinkpad 460 which is it goes “no service”. i am a total noob in computering, do you like mind if tell me one by one, step by step to resolve this problem? please?
thanks in advance
Hi Adam
Do you have all the drivers from Sierra Wireless website for your model?
Also do you have the same model for the wireless radio?
I’ve been using signal boosters https://www.myamplifiers.com/en-us/ for a while, they provide great signal and quality.
I recently added an EM7455 to my Lenovo P71. Had NO SERVICE, tried lots of software & driver changes. Finally acquired a pair of external ANTENNAS attached to the card and … PRESTO… I have service! Problem now is I can RECEIVE SMS but can’t SEND. Get “Generic Failure” or similar.
does the SIM card work?
you can use tera term to open the modem port and type:
AT!entercnd=“A710”
at+cfun?
AT!gstatus?
AT!impref?
AT!UIMS?
AT+CPIN?