Hello sambk87
For my case, the problem appears in a city center fully covered by tower cells of the operator. So YES I think it’s a hardware problem.
You can enable this unsolicited response as the others like +WIND, +CREG, +CGREG, … without any problem.
I mean that a simple reset by AT+CFUN=1 is not always sufficient to correct the problem. The only effective solution is a physical power off/on of the modem.
Attention all +WCER messages do not require a reset or power off/on.
A critical +WCER error is 0x1000.
I suggest you to start to log +WCER and give us your log results.
Marc