Hi I've seen a few posts on this and have read the std help.
The odd thing is that I tried it with an EE sim and same issue.
I have phoneinfo and CIDgetter installed if they would shed any light. I'm grateful for any pointers!
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Hi, while the networks merely list the frequency as 800MHz or 18000Mhz or 2.6GHz, in actuality the frequencies are not exactly rounded like 800MHz or 1800Mhz or 2.6GHz. So the 4G bands in US for the same frequencies might be different than than in UK, crazy fact is some carriers might do exactly like the one in UK bands but others might be closer to that freq but not exact.
So it's always bit risky to buy a phone from abroad to use in UK for LTE aspects as the manufacturers officially don't support it in UK even the specs says it has these many bands.
see this guide to 4g http://community.giffgaff.com/t5/Using-giffgaff/Guide-to-4G/ta-p/12134248#
then check Frequently Asked Questions
follow these 4 easy steps https://giffgaff.com/4g
order another sim here: https://giffgaff.com/orders/mgm
you may need to back up your contacts from your old sim first
For sim swap, log into here https://giffgaff.com/activate
Put the 6 digit code in from your new sim, And click continue,
On the next page it will show the 6 digit activation codes and sim serial numbers of your current and new sim cards.
Click where it says... "Yes I want to replace my SIM"
On the next page click "yes i am sure"
swap will not take long, and you will be up and running with your new sim/credit/goodybag and current number in no time at all
@bmenaman, hi, did you see my msg, i have seen lot of threads where various people said iPhone bought from US not working in UK though both have 800Mhz. For instance, iPhones bought in Tmobile was working but Verzion ones not working though all supports 800Mhz theoretically so same applies to your HTC as well.
800Mhz might be 800Mhz for Tmobile but it could be in fact 799.9Mhz in Verizon though they say it's 800Mhz, that's why we have so many SKUs for various carriers there. It's really tough to fix and need hack at chip level. Hopefully some forum expert here or other forum help you out as M8 is an excellent device otherwise.
I have just changed from a 3g goody bag to a 4g for this month and my HTC M9 is also not working on data at all even though it was on the 3g goody bag earlier this week. Have you changed from a 3g goody bag to the 4g one on your m8 as i also have an m8 and i had this issue when i frist changed to 4g goody bag last year. Giffgaff said it was a system issue which they had rectified but its strange its happened again on my M9.
I hadn't used giffgaff before, I ordered a nano sim and a 4G goodybag
The agents usually send people messages that they have incompatible 4G goodybags when there using 3G phones.
So with that they should be able to tell you if your phone can get 4G or not.
It sounds like you need to contact them on http://giff.ly/agentsinternet
Do you think there may be a problem with the software that you have changed?