48 sim in tp link ac750

hi,

router connected to external antenna
been fine but last week or so disconnecting every thirty mins or so.
Have reset to factory settings and re-entered apn,

Dial-up Settings
Profile Name:
48
PDP Type:
IPv4
APN Type:
Static
APN:
Username:
Password:

Authentication Type:
NONE

log from router


1 2021-02-11 13:12:10 HTTPD Information NCSI response check succeed.
2 2021-02-11 13:12:10 HTTPD Information DNS 10.11.1.186 resolve succeed for www.msftncsi.com
3 2021-02-11 13:12:10 HTTPD Information DNS 10.11.1.186 resolve succeed for dns.msftncsi.com
4 2021-02-11 13:12:08 4G Information USER: Now registrat on network 272 5, long_eons 48 short_eons 48.
5 2021-02-11 13:12:07 4G Information USER: Now registrat on network 272 5, long_eons 48 short_eons 48.
6 2021-02-11 13:12:07 4G Information USER: Registered with a network!
7 2021-02-11 13:12:07 4G Information USER: Not registered, searching!

48 will not speak to me as it's a router.

It's being used in a old house with a few pensioners. No other access to internet, I was able to get €10 a month past the finance crowd but there's no way they would goto €30.

So, any help would be really appreciated.

Thanks for reading.