I used to be able to access the internet via 3G (I had many warnings about reaching my data quota), but at some point this feature stopped working. Sometimes I can’t access the internet even when my phone says that wifi networks are available (this always seems to happen on a train).
I’ve followed the instructions from this earlier thread:
I am assuming you have your FP2 contract with the Phone Co-Op in the UK ? I am with them as well and initially they had me on their standard FP2 contract that uses EE as carrier. My experience with EE is that they have really bad coverage in non-urban areas. I am now still with the Phone Co-Op, but switched to their (more expensive) Vodafone based contract and I do not have any problems so far.
Your problems with WiFi on trains is common. The train itself connects to the internet via a normal mobile data connection. When the train passes an area with no or bad mobile network coverage, you still have your WiFi connection, but no internet. Even with internet connection WiFi on trains can be tricky because the fast moving train has to switch to another mobile tower quite often what can cause data disruptions.
This may or may not be relevant…
In September I went on holiday to Montenegro, flying to Dubrovnik in neighbouring Croatia. I had checked with the Phone Co-op beforehand that I would have mobile phone coverage, but on crossing the border into Montenegro I found myself unable to make calls or texts. I had to make do to with WhatsApp, email or Facebook Messenger to contact people (wi-fi permitting, but fortunately this was available everywhere I stayed).
I mention all this because I went to a mobile phone shop (Telenor) in Montenegro and bought a new SIM card under the (mis-)apprehension that this would enable data roaming. So there is a second SIM card in my Fairphone but it’s currently disabled. I wonder if the sales assistant did something to disable the 3G data coverage. Unfortunately I’m not 100% sure that I had 3G right up to my holiday.
I used to have two SIM cards in my FP2. 4G was enabled on SIM2. When I disabled SIM2, SIM1 still stayed on 2G only.
I had to enable the (already invalid) SIM2 again, just to set that to 2G mode, so I was able to put SIM1 into 4G mode, and finally disable SIM2 again.
May also be a problem at Phone Co-op. I have had to call Telfort a few times in the past 3 years on my current contract, because their mobile broadband had stopped working for no apparent reason, and after “fixing something” at their end, internet was back. That happened on my previous phone, but with a Fairphone these provider-side issues could occur just as well.
It’s still quite unclear what you are doing. Are you able to make phonecalls and receive texts? If yes, did you enable data when disconnecting from wifi and did you receive new APN settings when changing sim cards?
Do you have mobile data enabled?
-> Settings -> Data usage -> go the tab for the relevant SIM card -> put “Mobile data” slider to “enabled” position
-> in the same menu, is “Set mobile data limit” checked?
Which is the preferred SIM card for cellular data usage?
-> Settings -> SIM cards -> scroll down to “Preferred SIM card for” -> “Mobile data”
I think you have already check the settings in “Cellular network settings” are right, by anyway:
-> Settings -> More -> Mobile networks -> go to the tab for the relevant SIM card
Check that “Preferred network type” is set to 3G or 4G
You probably don’t need data roaming when you’re staying in the country the SIM card is bought in
Settings in “Access point names” should be configured according to your network providers specifications, like discussed in the posts above already.