HSPA+ not working with Xperia Z C6602

[goldbranch]

I purchased the C6602 model mainly to go with T-Mobile HSPA+ but it doesn't seem to work properly. Data speed is extremely slow (50Kbps/100Kbps download/upload) and I only see the letter "E" (for Edge?) instead of H for HSPA on my signal bars.

I've tried all kinds of different APNs but nothing changed. I also tried my sim card on my friend's iphone 4S and it worked perfectly fine with 4Mbps/1.5Mbps download/upload, so the problem must be from the Xperia Z.

Anyone knows how to fix this?

Thanks.

[Uliwooly]

post the APN settings that you have try

[goldbranch]

Method1

•     Name: T-Mobile Data (or T-Mobile US)

•     APN: epc.tmobile.com

•     Proxy:

•     Port:

•     Username: None

o     Note: For the Username, enter "None" with the keypad. Do not leave it not set.

•     Password:

•     Server:

•     MMSC: http://mms.msg.eng.t-mobile.com/mms/wapenc

•     MMS proxy:

•     MMS port:

•     MMS protocol: WAP 2.0

•     MCC: 310

•     MNC: 260

•     Authentication type:

•     APN type: default,supl,admin,dun,mms

2.     Press the Menu key.

3.     Touch Save.

Method 2

APN: epc.tmobile.com

Proxy: not set

Port: not set

Username: none

Password: **

Server: *

MMSC: http://mms.msg.eng.t-mobile.com/mms/wapenc

MMS Proxy: 216.155.165.50

MMS port: 8080

MCC: 310

MNC:260

Authentication Type: Not set

APN Type: not set

Method 3

Name: T-Mobile US

APN: epc.tmobile.com

Proxy: 216.155.165.050

Port: 8080

Username: (leave this blank)

Password: (leave this blank)

Server: (leave this blank)

MMSC: http://mms.msg.english.t-mobile.com/mms/wapenc

MMS Proxy: 261.155.165.050

MMS Port: 8080

MMS Protocol: WAP 2.0 (don't know if this is important)

MCC: 310

MNC: 260

APN Type: (leave this blank)

and fiinally, this one from T-Mobile support:

• Name: T-Mobile
• APN: epc.tmobile.com or fast.tmobile.com (for LTE devices)
• Proxy:
• Port:
• Username:
• Password:
• Server:
• MMSC: http://mms.msg.eng.t-mobile.com/mms/wapenc
• MMS proxy:
• MMS port:
• MMS protocol: WAP 2.0
• MCC: 310
• MNC: 260
• Authentication type:
• APN type: OR Internet+MMS (depending on software version)

[Uliwooly]

I know its a long shot but what if you get a brand new micro sim card, i know it works with the iphone 4s as you mentioned it above but its worth a try.

[goldbranch]

Oh it's actually a new sim card that I just activated a few days ago.

[Zann_H]

Did you buy your Z from the same telco? If not, can you bring the phone to the telco and ask them to check if your phone is compatible with the network?

[goldbranch]

No I bought it from Newegg.com and I'll try to bring it down to a T-mobile shop later to see if it would help. But I mean, isn't the C6602 model designed to work with T-mobile HSPA+ right out of box?

[goldbranch]

Ok, T-Mobile shop can't do anything about it. I also called 611 for troubleshooting and they did reset my network connection but nothing changed. Does anyone know what's the best way to contact Sony before I assume this phone's HSPA is defective and return it?

[Uliwooly]

here you go

http://www.sonymobile.com/global-en/support/contact-us/

how about if you repair your phone ?

Update Service (SUS)

http://www.sonymobile.com/gb/tools/update-service/

http://www-support-downloads.sonymobile.com/Software%20Downloads/Update_Service_Setup-2.11.12.5.exe

[goldbranch]

Alright, I just chat to a Sony Rep and he says that the phone (C6602) will only get Edge with T-Mobile since T-Mobile uses kinda like half HSPA, half LTE signal so the phone's attenna cannot receive full HSPA. That just sucks as I have been using T-Mobile for a long time and I really love the phone.

Now he says that C6602 would work with At&t and its sub-companies HSPA. What are these sub-companies of At&t we are talking about?