Wireless Providers

[#1]

In my country, i have a problem that's my pre 2 can not connect 2G signal although it has 4 bar signal,

It can connect Edge/GPRS but can not make call, it always drop

when i change to 3G, it works normaly

I don't know why, it happen some region in my country.

i change to another sim card with other provider, it work in 2G normaly.

what happen with my pre ???

sorry for my bad english

Post relates to: Pre 2 p102ueu (Unlocked EU)

[#2]

Hello!

It will really help us out if we knew the carrier you are having the problem with.  Also need to know the country the phone is having the issue in with that carrier.

Also to note when connecting with 2g/Edge/GPRS, you cannot do voice and data at the same time but the device should drop that data for voice.  If that fails, it is ususally due to an outdated sim card in use.  That SIM card a 3G SIM card???  Keep me posted.

[#3]

My carrier is MOBIFONE (http://www.mobifone.com.vn/web/en/). I'm in VietNam.

when i make a call by using 2G, it's dropped but it can connect to GPRS/EDGE for data (i can check mail). it is not happens when i'm in big city (such as Ho Chi Minh City).

That SIM card is a 3G SIM card. when 3G is actived, it works ok in all region.

[#4]

Due note that when connected to 2g, GPRS/EDGE, voice and data at the same time is not an option so calls will always drop the data connection till call is done.  When using 3G (HSPA/UMTS), voice and data is possible.  From you description, it is how the network is setup in those areas are yeilding your issue.