Help slow mobile internet Samsung Galaxy S3 (GT-I9300).

[GalaxiaAndroid]

Hi Everyone,

I have been having issues with a slow mobile internet connection for a few weeks now. My network provider is Giffgaff. This is the result I get when I check service status for my area on Giffgaff:

Our network is currently working fine
If we're doing work on the phone masts near you we'll tell you about it here.
Updated 18:00 (refreshed hourly). Recent faults might not show yet.



Normal coverage for Voice, text and email (2G)

• Making calls, sending texts, using email on your phone.
  Good indoors and outdoors.
  
  
• 
  Normal coverage for Mobile internet and voice (3G)
  Fast networking. For smartphones, dongles and tablets.
  Good indoors and outdoors. Good for mobile broadband.
  
  

My S3 works fine on WIFI connection and I regularly get download speed of 7mbps or more and upload of 1.5mbps (normal connection speeds for my home phoneline). Whereas on 2G/3G I get speeds of 0.50mbps download and 0.08mbps upload. I regularly have a 4 bar full signal on my S3 too.

Contacted Samsung support and was asked to update S3 to latest firmware using KIES as was told this should solve slow mobile internet connection. When I checked KIES for firmware update I already had the latest current firmware installed on my S3 (Android version: 4.1.2). Firmware version: PDA:MA2 / PHONE:LLA / CSC:MA1 (OPS). I have backed up the data on my S3 and restored it using KIES. I have also used firmware upgrade and initialisation on KIES to restore my S3 to factory settings. None of the above have worked to increase mobile internet speed on my S3. Any ideas what is wrong?

Thanks in advance,

Ben.