60gig SIM card and TP link Mifi

[Malcolm_1107053]

I use a smarty SIM card and the TP link mifi whilst boating in the summer months. I purchase data just before a trip and usually buy 40gig which is upgraded free to 60gig. This is enough for both tv and internet use. 
what is causing concern is that recently whilst the TP link shows a 4g signal and 3 bars during the hours of say 10am and 7pm I don’t receive any internet connection. Later on I can use the TP link to watch Tv using up about 3-5 gig per day. I don’t know why this has started to occur. There is no change in the status on the TP link, sometimes restarting it works but after two or three times that fails too. Annoyingly there seems to be no explanation. Now and again I find the WiFi settings show no internet connection despite having a good signal on the mifi. 
Having no service during the day seems very odd when I have service early morning and during the evening. As a contrast I have a giff gaff sim in my phone with a lot less data but it works when the smarty sim does not.

Any thoughts welcome

Malcolm

[AlanCha_3432519]

Different networks with giffgaff on O2 and Smarty on three.

You could experiment with swapping the SIMs over

[Malcolm_1107053]

Thank you, I am aware of the differing networks. I have changed SIM cards but the smarty one works in the mornings and late evening in either the phone or Tp link. It is in the same location and the signal strength remains at 3 out of 4 bars, but nothing loads, switch the Tp link off and on again and for a while you receive data. Occasionally the message, not connected to the internet appears but at other times you are left frustrated whilst nothing loads. The mifi app shows some activity but not enough to load documents.

regards

Malcolm