topic Re: Data locked when switching from 4g back to 3g in Android

Data locked when switching from 4g back to 3g

rob1982 — Sat, 04 Jul 2015 14:45:21 GMT

Recently purchased a new HTC One M9 from Carphone Warehouse on O2.

Fairly happy apart from patchy signal by my house despite O2 coverage checker showing full 3G and even small pockets of 4G.

My main issue is that for some reason when I go from a 4G connection back to 3G despite the phone showing a decent signal nothing that requires a data connection will work.

To resolve this I simply have to go in to airplane mode and back out again.

This is not ideal as I commute a fair distance on a daily occurance so this has to be done multiple times throughout the day.

I'm not convinced this is an O2 issue though as I had the same issue with my initial purchase of the M9 through Vodafone, due to terrible signal everywhere I went.I took that phone back and replaced it with one on O2.

Has anyone else experienced this or know of a more permanent solution?

Re: Data locked when switching from 4g back to 3g

perksie — Sat, 04 Jul 2015 15:21:39 GMT

Does turning 4G off help?

Have you checked for signal problems in your area?

http://status.o2.co.uk/

Re: Data locked when switching from 4g back to 3g

rob1982 — Sat, 04 Jul 2015 16:23:53 GMT

I've just checked on O2 status and it does report that there have been works carried out on the masts near my post code in the last 24 hours but says the network is currently working fine, this may explain why the signal has been a bit patchy.

As for the "data locking" I've been experiencing, I have not tried turning off the 4G connection, I will try doing that and comment after my commute home today.

Thanks

Re: Data locked when switching from 4g back to 3g

rob1982 — Sat, 04 Jul 2015 21:34:12 GMT

Well I turned 4g off ready for my train journey home.

Turns out it had an improvement, the only time I lost connection is where it was expected and I had no signal whatsoever or dropped to 2g (pretty much the same thing).

Signal is still poor by my house so I think the network status check might have lied about everything running smoothly.

Not sure what to do about my 4g though as I want to get it turned back on for obvious reasons.

Re: Data locked when switching from 4g back to 3g

Anonymous — Sun, 05 Jul 2015 09:29:48 GMT

http://forums.androidcentral.com/htc-one-m9/532414-m9-problems-when-4g-transitioning.html

http://forums.androidcentral.com/htc-one-m9/526486-why-can-t-i-send-text-messages-4g.html

You are not the only one....but couldn't find an answer anywhere...

Any ideas @viridis, @MI5, @Bambino, @jonsie...?

Re: Data locked when switching from 4g back to 3g

MI5 — Sun, 05 Jul 2015 13:46:08 GMT

I used to get this occasionally on Kit Kat but I've not experienced it on Lollipop, however, it's most likely a bug in the phones modem software.

Re: Data locked when switching from 4g back to 3g

rob1982 — Mon, 06 Jul 2015 10:24:57 GMT

Thanks for your input.

It would be a bit of a concern for M9 owners if the problem is with the modem software as I have had x2 M9s now with the same issue which could suggest a build issue.

Would be interesting to know if this happens on rooted phones or even international variants.

Re: Data locked when switching from 4g back to 3g

Cleoriff — Mon, 06 Jul 2015 10:27:28 GMT

@MI5 is the one to answer this query @rob1982

Re: Data locked when switching from 4g back to 3g

MI5 — Mon, 06 Jul 2015 10:40:26 GMT

Rooting a device would not change the modem so unless a different modem was flashed the issue would still be present.

Re: Data locked when switching from 4g back to 3g

rob1982 — Mon, 06 Jul 2015 14:51:26 GMT

Basically I'm not getting rid of this problem am I?

Re: Data locked when switching from 4g back to 3g

MI5 — Mon, 06 Jul 2015 14:58:14 GMT

Try your sim in another phone first.
If that cures it I'd say it was a fault with the modem in M9's and therefore would be worth you talking to HTC to see if there was anything else they could suggest.

Re: Data locked when switching from 4g back to 3g

rob1982 — Mon, 06 Jul 2015 15:55:48 GMT

Considering I've had the same problem with 2 phones and 2 sims on different networks I've decided to raise it up with htc as you suggested.

I will post whatever response I get (if any)

Re: Data locked when switching from 4g back to 3g

MI5 — Mon, 06 Jul 2015 16:34:12 GMT

Cheers. Will be interesting to hear what they have to say.

Re: Data locked when switching from 4g back to 3g

rob1982 — Thu, 09 Jul 2015 13:33:26 GMT

Turns out that htc support is actually quite rubbish.

I never got a response to my email so I decided to give them a call.

After explaining everything to them they tried to blame it on coverage.

It would sound reasonable if the area wasn't about 50 miles in radius.

All he said was to go back to carphone warehouse, looks like I may have to argue with them and get a different phone, shame as I like this one but it's no good if it doesn't transition between 4g and 3g.

Re: Data locked when switching from 4g back to 3g

jonsie — Thu, 09 Jul 2015 14:13:13 GMT

Not the reaction I was expecting....

Re: Data locked when switching from 4g back to 3g

MI5 — Thu, 09 Jul 2015 15:32:27 GMT

Have you managed to find any evidence of others having issues with this phone at all?

Re: Data locked when switching from 4g back to 3g

rob1982 — Thu, 09 Jul 2015 17:33:44 GMT

I've not found much in the way of UK users having similar issues.

There is the well published issues in the US with sprint but I'm not sure it's the same.

Just a bit stuck now, not sure what's the best course of action.

Re: Data locked when switching from 4g back to 3g

MI5 — Thu, 09 Jul 2015 18:03:06 GMT

I would still push HTC to take a look at it under warranty.
It may be something as simple as an antenna fault which there test rigs will show up.