account arrowhead-down arrowhead-up mobile-menu search sm-bold-x x-skinny-rounded x-skinny arrowhead-right social-facebook social-googleplus social-instagram social-linkedin social-pinterest social-qzone social-renren social-tencent social-twitter social-vkontakt social-weibo social-youku social-youtube

Please help us improve our website

Take our customer survey to evaluate your visit.

It should only take a few minutes to answer five quick questions. Just click the Launch survey button at the end of your visit to begin.

cancel
Showing results for 
Search instead for 
Did you mean: 
Tips & Tricks

Want to know more about Xperia 5? To read more about it go here.
If you can't find the answer to your question there please post it here and let the community help you.

Network type falling back to WCDMA/GSM

SOLVED
Learner
Message 1 of 12
4,091 Views
Message 1 of 12

Network type falling back to WCDMA/GSM

Hello,

 

got a Z1C a week ago. I never get 4G/LTE signal. My carrier is ok, cause if i put my sim in a LG G2 i get 4G/LTE.

 

From Network settings menu, if Iset network type to LTE/WCDMA/GSM, after a while it catches 3G/H/H+. Going back in the menu, the network type falls back to WCDMA/GSM.

 

From *#*#4636#*#* menu, if I set mode to LTE-only, I don't even get signal.

 

Is updated to last version (android & apps)

 

baseband 8974-AAAAANAZQ-10270075-68
Build 14.5.A.0.270

 

Help !

1 ACCEPTED SOLUTION

Accepted Solutions
Emperor
Message 7 of 12
5,036 Views
Message 7 of 12

Re: Network type falling back to WCDMA/GSM

@briant566

 

What I would do is to get a brand new MICRO SIM card, even if the old SIM card works. 




"I'd rather be hated for who I am, than loved for who I am not." Kurt Cobain (1967-1994)

11 REPLIES 11
Emperor
Message 2 of 12
4,086 Views
Message 2 of 12

Re: Network type falling back to WCDMA/GSM

@Delph

 

is your Z1 compact compatible with your network's LTE bands? do you have the correct APN settings? are you using a nano SIM card? 




"I'd rather be hated for who I am, than loved for who I am not." Kurt Cobain (1967-1994)

Learner
Message 3 of 12
4,015 Views
Message 3 of 12

Re: Network type falling back to WCDMA/GSM

uliwooly

 

Thanks for your answer.

 

1) carrier band is 7 (2600MHz) only atm. Should be OK

2) APN settings : tested APN settings sent at first start from carrier and ones downloaded from sony by network menu. Difference is minimal (sony adds a-gps and dial up flags but carrier replaces hostname on mms apn by IP). Both allows me to 2G/3G/H/H+ and send receive mms

3) Sim card is an old (4years) 2 format sim. micro and normal with adaptator.

 

Regarding APN settings, do you have some particular settings for LTE ? I saw the LTE flag in Network APN setting.

 

Highlighted
Adept
Message 4 of 12
4,000 Views
Message 4 of 12

Re: Network type falling back to WCDMA/GSM

 This is exactly my problem mine seems unable to lock on to  weak signal it has been sent back 3 time but all they say is it is within spec ,Which i agree but only if you are in a full signal are

Mine has only started since updated to lollipop 

So it seems  to me that the 4 g signal has been used and the 3 g lowered

 

My post is weak  "network signal "

Learner
Message 5 of 12
3,993 Views
Message 5 of 12

Re: Network type falling back to WCDMA/GSM

briant566

I have no weak signal problem. My 3G signal is like my LG G2 signal.

Our problems are differents in my opinion

Adept
Message 6 of 12
3,983 Views
Message 6 of 12

Re: Network type falling back to WCDMA/GSM

 sorry yes you are right having read your post again


@Delph wrote:

@briant566

I have no weak signal problem. My 3G signal is like my LG G2 signal.

Our problems are differents in my opinion


 

Emperor
Message 7 of 12
5,037 Views
Message 7 of 12

Re: Network type falling back to WCDMA/GSM

@briant566

 

What I would do is to get a brand new MICRO SIM card, even if the old SIM card works. 




"I'd rather be hated for who I am, than loved for who I am not." Kurt Cobain (1967-1994)

Learner
Message 8 of 12
3,954 Views
Message 8 of 12

Re: Network type falling back to WCDMA/GSM

@uliwooly

 

I did some tests showing that this is a very WEAK signal problem. I can get LTE if i stand near the antena.

 

On my LG G2 if I have less than 3 bars out of 5, the I can't get LTE on Z1C.

 

This is very anoying.

Emperor
Message 9 of 12
3,939 Views
Message 9 of 12

Re: Network type falling back to WCDMA/GSM

@Delph

 

Don't rely on the bars, check 

 

settings > about phone > status > signal strength on both phones. 




"I'd rather be hated for who I am, than loved for who I am not." Kurt Cobain (1967-1994)

Learner
Message 10 of 12
3,916 Views
Message 10 of 12

Re: Network type falling back to WCDMA/GSM

Since yesterday its fixed. Don't ask me how... Staying to lte prefered and getting lte. Last thing i did was forcing carrier network to lte after a manual search.

Uliwooly: you were right. Got only 3 db difference.