I used to mobile phone compatibility InputType="Number"
problem
1. style problem
2. EnforceMaxLength not running
3. MaxLength not running

remove InputType="Number" no problem

(inputtype=number purpose use to come out leaving only the numeric keyboard for mobile applications)


    <ext:FormPanel ID="FormPanel_AddNewUser" runat="server" MonitorValid="true" Frame="true" Layout="FitLayout" ButtonAlign="Center">
        <FieldDefaults LabelAlign="Top" MsgTarget="Qtip" LabelWidth="70" EnforceMaxLength="true" />
        <Items>
            <ext:FieldSet ID="FieldSet_AddUser" runat="server" DefaultAnchor="100%" Margin="5" Padding="10" Border="false">
                <Items>
                    <ext:TextField ID="txtPhoneNumber" runat="server" InputType="Number" AllowBlank="false" Size="10" MaxLength="10" MaskRe="[\d\-]" FieldLabel="<%$ Resources:BulutSpotReg, RegTxtGsmLbl %>" Note="<%$ Resources:BulutSpotReg, RegTxtGsmEmptyText %>"  BlankText="<%$ Resources:BulutSpotReg, BlankText %>" />
                    <ext:MenuSeparator />