Gsm 1800

[dharmabm]

i'm having issues lately if my phone network is set to automatic where edge doesn't work and calls keep dropping. i've discovered that i keep connecting to GSM 1800 instead of TH GSM (i'm on AIS). anyone else seeing this or know what the deal is? first time i saw it was a few weeks ago when a friend came back from europe and his iPhone didn't work, setting manually to TH GSM seems to fix it, but what a pain in the ass!

[CWMcMurray]

My phone is also reading TH GSM 1800 rather than 3G or Edge and it all this morning I could not get online via my iPhone ?

I am now at the office an connected via wifi, but not sure how to fix things to start getting 3G service back

Any ideas?

[lomatopo]

This issue has been commented upon before but I am unable to find the relevant thread(s). My vaguest recollection is that AIS has several brands/networks - a legacy of their shaking down suppliers for free equipment - of which one is "GSM 1800".

http://www.gsm1800.a...th/th/index.asp

I think you may have to contact AIS and move/port to a 'real' AIS (GSM900) number. This will require a new SIM.

Note that any frequency discussion here is related to GSM (voice, text, 2G data) only, and not 3G.

Edited July 3, 2012 by lomatopo

[CWMcMurray]

Around 3pm it just switched back to 3G on its own ???

[lomatopo]

Around 3pm it just switched back to 3G on its own ???

Which iPhone model do you have? Which SIM? Which plan?

Is this a new problem? Has the phone/service ever worked satisfactorily for you?

It is challenging to help when so little information is provided.

Many, many people complain about AIS/One-2-Call's 3 performance, particularly in higher density areas and/or when roaming on to TOT's 3G network.

[CWMcMurray]

iPhone 4 .... AIS sim.... Unlimited data and a certain number of phone minutes per month